Il est toxique (voire très toxique sous certaines formes) à des concentrations à peine plus élevées que celles qui en font un oligoélément indispensable à la diète animale.
These blocks are named for the characteristic spectra they produce: sharp (s), principal (p), diffuse (d), and fundamental (f). Properties: Selenium has an atomic radius of 117 pm, a melting point of 220.5°C, boiling point of 685°C, with oxidation states of 6, 4, and -2. Half of the distance between two unbonded atoms of the same element when the electrostatic forces are balanced. Values are given for typical oxidation number and coordination. Trivial name of Selenium is chalcogens*. Some elements exist in several different structural forms, called allotropes. It is a nonmetal with properties that are intermediate between those of its periodic table column-adjacent chalcogen elements sulfur and tellurium. The sum of the oxidation states within a compound or ion must equal the overall charge. Atomic Symbol. The atomic number of each element increases by one, reading from left to right. — In-game description Selenium is a Raw Material introduced in v2.0. Selenium : Atomic Number 34 , Mass Number 78 . The percentage of a commodity which is recycled. Text © The Royal Society of Chemistry 1999-2011
These muds are either roasted with sodium carbonate or sulfuric acid, or smelted with sodium carbonate to release the selenium. The chemical symbol for Selenium is Se. The Atomic number, Atomic mass and the number of valance electrons all increase from left to right. The higher the value, the larger risk there is to supply. Hello, this week flaky scalps, skunks, dead polo ponies and an element that makes you stink of garlic. Melting Point: 493.65 K (220.5°C or 428.9°F) Boiling Point: 958 K (685°C or 1265°F) Density: 4.809 grams per cubic centimeter. Selenium (Se) Atomic Data for Selenium (Se) Atomic Number = 34 Atomic Weight = 78.96 … 4 Related Records Expand this section. Atomic numbers pics is a collection of sciencetuts. Selenium chemical element. In fact a little investigation showed me that it was perfectly safe in small amounts. All such documents and related graphics are provided "as is" without any representation or endorsement made and warranty of any kind, whether expressed or implied, including but not limited to the implied warranties of fitness for a particular purpose, non-infringement, compatibility, security and accuracy. Our selenium page has over 260 facts that span 106 different quantities. Selenium is toxic to the scalp fungus that causes dandruff so it is used in some anti-dandruff shampoos. Symbol: Se; atomic weight: 78.96; atomic number: 34; specific gravity: (gray) 4.80 at 25°C, (red) 4.50 at 25°C. Selenium is known to have over 20 different isotopes; however, only 5 of them are stable. Element Classification: Non-metal. The temperature at which the solid–liquid phase change occurs. Group
Although it is uncommonly found, selenium does exist in relatively pure form, free in nature. Selenium Overview . More... Molecular Weight: 74.922523 g/mol. 34 electrons (green) bind to the nucleus, successively occupying available electron shells (rings). The energy released when an electron is added to the neutral atom and a negative ion is formed. Selenium is a chemical element with atomic number 34 which means there are 34 protons in its nucleus. The selenium atom has a radius of 120 pm and a Van der Waals radius of 190 pm. Technical data for Selenium Click any property name to see plots of that property for all the elements. The temperature at which the liquid–gas phase change occurs. It has the symbol Se. Chemical element of periodic table. Selenium is a non-metal and was discovered in 1817. Uses of selenium . The temperature at which the liquid–gas phase change occurs. From: Analytica Chimica Acta, 2013 Related terms: Density is the mass of a substance that would fill 1 cm3 at room temperature. Selenium is a chemical element with atomic number 34 and symbol Se. Boiling point
This Site has been carefully prepared for your visit, and we ask you to honour and agree to the following terms and conditions when using this Site. Selenium is a chemical element with symbol Se and atomic number 34. For more information on the Visual Elements image see the Uses and properties section below. Our bodies contain about 14 milligrams, and every cell in a human body contains more than a million selenium atoms. In such cases we would ask you to sign a Visual Elements licence agreement, tailored to the specific use you propose. Sign with atomic number and atomic weight. Le sélénium est un oligoélément et un bioélément, mais à très faible dose. Melting point of Selenium is 217 °C and its the boiling point is 685 °C. UNII-CPT0VS6XYI. Butyl seleno mercaptan is the essential ingredient of skunk smell, and is certainly a contender for the title of the worst smelling compound. The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs. Berzelius found that selenium was present in samples of tellurium and gave that element its characteristic smell. Boiling point of Selenium in Kelvin is 958 K. Selenium melting point is 217 °C. It has been widely used in electronic devices. Se is a non-metal. The availability of suitable substitutes for a given commodity. Selenium is added to synthetic rubber to improve resistance to abrasion, it has been added to brass, along with bismuth, to replace lead in pipes, and it is used, as sodium selenate, as an insecticide to stop attacks on flowering plants such as chrysanthemums and carnations. It is therefore useful in photocells, solar cells and photocopiers. CPT0VS6XYI. Selenium (Se) is a grey non metal that can also exist as a red allotrope. The number of electrons in each of Selenium's shells is 2, 8, 18, 6 and its electron configuration is [Ar] 3d 10 4s 2 4p 4. It is given by the ratio of the pressure on a body to the fractional decrease in volume. High amount of selenium is also present in oceans . The most common ore of selenium are the sulfide ores. The number of electrons in each of Selenium's shells is 2, 8, 18, 6 and its electron configuration is [Ar] 3d 10 4s 2 4p 4. Chemical element of periodic table. Atomic symbol (on the Periodic Table of Elements): Se 3. When I was in my early 20s I developed a dry scalp condition for a few years, probably a result of anxiety over research grants I was trying to obtain. It can also convert AC electricity to DC electricity, so is extensively used in rectifiers. Chemical symbol for Selenium is Se. At first he thought it was the element tellurium because it gave off a strong smell of radishes when heated, but he eventually realised that it was in fact a new element. Density (g cm−3)
It is a nonmetal element with the atomic number 34. hydrure␣de␣sélénium It was Berzelius who discovered selenium in 1817, as an impurity in sulphuric acid. Atomic Number of Selenium Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. The five stable isotopes of selenium are The Chemical Abstracts Service registry number is a unique identifier of a particular chemical, designed to prevent confusion arising from different languages and naming systems. The name is derived from 'selene', the Greek name for the Moon. Atomic number
This is where the artist explains his interpretation of the element and the science behind the picture. Selenium trioxide (SeO 3) Interesting facts: It is similar to sulfur in its form and compounds. We know selenium is there, right under sulfur, in the periodic table, but it doesn't get much attention. Members of a group typically have similar properties and electron configurations in their outer shell. This is a list of the 118 chemical elements which have been identified as of 2021. Values are given for typical oxidation number and coordination. A semi-metal that can exist in two forms: as a silvery metal or as a red powder. An integrated supply risk index from 1 (very low risk) to 10 (very high risk). History and Discovery . Melting point of Selenium is 217 °C and its the boiling point is 685 °C. Name: Selenium Symbol: Se Atomic Number: 34 Atomic Mass: 78.96 amu Melting Point: 217.0 °C (490.15 K, 422.6 °F) Boiling Point: 684.9 °C (958.05005 K, 1264.8201 °F) Number of Protons/Electrons: 34 Number of Neutrons: 45 Classification: Non-metal Crystal Structure: Hexagonal Density @ 293 K: 4.79 g/cm 3 Color: gray Atomic Structure Sign Selenium with atomic number and atomic weight. Selenium (selenium atoms only) has several different forms. Pornographic, defamatory, libellous, scandalous, fraudulent, immoral, infringing or otherwise unlawful use of the Images is, of course, prohibited. It is located in Group 16 of the periodic table. The mass of an atom relative to that of carbon-12. Atomic weight of Selenium is 78.971 u or g/mol. Bond enthalpy (kJ mol−1)A measure of how much energy is needed to break all of the bonds of the same type in one mole of gaseous molecules. State of Selenium is Solid at standard temperature and pressure Specific heat capacity is the amount of energy needed to change the temperature of a kilogram of a substance by 1 K. A measure of the stiffness of a substance. Density: 4.809 grams per cubic centimeter 5. The RSC maintains this Site for your information, education, communication, and personal entertainment. Krypton has been portrayed consistently as having been destroyed just after Superman's flight from the planet, with exact details of its destruction varying by time period, writers and franchise. Selenium (Se). Group Name: Chalcogen.
The number of electrons in each of Selenium's shells is 2, 8, 18, 6 and its electron configuration is [Ar] 3d 10 4s 2 4p 4.
Sign with atomic number and atomic weight. Most of the world’s selenium is obtained from the anode muds produced during the electrolytic refining of copper. Atomic Number – Protons, Electrons and Neutrons in Polonium. How slighted is this important element! In the human body, selenium content ranges betwe… Selenium is a member of the sulfur group of nonmetallic elements and is similar to this element in terms of its forms and compounds. Properties: Selenium has an atomic radius of 117 pm, a melting point of 220.5°C, boiling point of 685°C, with oxidation states of 6, 4, and -2. What's in a name? The number of atoms of the element per 1 million atoms of the Earth’s crust. Selenium can also be used to reduce the transmission of sunlight in architectural glass, giving it a bronze tint. Krypton is a fictional planet in the DC Comics universe, and the native world of the super-heroes Superman, Supergirl, and Krypto the "super dog". And you can catch the facts about Krypton, rather than the fiction with Angleos Michaelides at next week's Chemistry in its Element. Selenium (Se). Period Number: 4. Isotopes of an element are atoms that have the same atomic numbers but a different number of neutrons (different mass numbers) in their nuclei. Molecule And Communication Background. The arrangements of electrons above the last (closed shell) noble gas. Murray Robertson is the artist behind the images which make up Visual Elements. High = substitution not possible or very difficult. The availability of suitable substitutes for a given commodity. Atomic Number of Selenium is 34. The Chemical Abstracts Service registry number is a unique identifier of a particular chemical, designed to prevent confusion arising from different languages and naming systems. Where more than one isotope exists, the value given is the abundance weighted average. Elemental state of Selenium or as a pure ore compound rarely occurs in the Earth's crust. Boiling point: 1,265 F (685 C) 8. Selenium has both a photovoltaic action (converts light to electricity) and a photoconductive action (electrical resistance decreases with increased illumination). Please enable JavaScript to access the full features of the site. Selenium with Atomic Number Z = 34 and Mass Number A = 78.96 is in group VIA and period 4 of the periodic table of the elements.# It has sulfur on top and arsenic next to it. 400 micrograms per day is set as the safe upper intake level in humans. Un préfixe (Nouveau mot formé en ajoutant une ou plusieurs lettres devant le mot.) Chemistry in its element is brought to you by the Royal Society of Chemistry and produced by. The element is named after Selene, the Greek goddess of the moon. – kaufen Sie diese Vektorgrafik und finden Sie ähnliche Vektorgrafiken auf Adobe Stock This is calculated by combining the scores for crustal abundance, reserve distribution, production concentration, substitutability, recycling rate and political stability scores. 3 Chemical and Physical Properties Expand this section. Every atom has an atomic number, even Selenium. Selenium was discovered jointly in 1817 by Swedish chemists Jöns Jakob Berzelius (1779–1848) and Johan Gottlieb Gahn (1745–1818). Selenium (atomic symbol: Se, atomic number: 34) is a Block P, Group 16, Period 4 element with an atomic radius of 78.96. The colour ranges from grey metallic to red glassy. These blocks are named for the characteristic spectra they produce: sharp (s), principal (p), diffuse (d), and fundamental (f). Selenium is not an abundant element. Généralité sur l'élément et histoire. Similar Illustrations See All. A measure of how much energy is needed to break all of the bonds of the same type in one mole of gaseous molecules. But the diversity of uses of selenium does not stop with shampoo and horse food supplements and photovoltaics. Element 34 of Periodic table is Selenium with atomic number 34, atomic weight 78.96. It is indicated by the symbol Se and the atomic number of selenium is 34.
Areas covered include atomic structure, physical properties, atomic interaction, thermodynamics, identification, atomic size, crystal structure, history, abundances, and nomenclature. Political stability of top reserve holder. Relative atomic mass
Electron configuration
Here are the properties of selenium, according to the Jefferson Lab: 1. Selenium is considered to be a nonmetal. Its chemical symbol is Se and its atomic number is 34. Se Chemical element of the periodic table on a glossy white. You get the number of neutrons by subtracting the atomic number from the mass (80). Selenium was discovered by Jöns Jacob Berzelius (SE) in 1817. Both sulfur and arsenic have some healing properties, and since neighbors in the periodic table have similar properties, it is not surprising that selenium seems to influence human health. The percentage of the world reserves located in the country with the largest reserves.
A horizontal row in the periodic table.
Selenium is a chemical element. atom atomic atomic␣number atomicus chemical chemical␣element Chemie element elemento elemento␣químico Elementum nonmetallic number numerus Química químico scheikunde seleen Selen Selenio selênio selenium symbol this with. But we require it as part of various enzymes, such as glutathione peroxidase, as well as in the thyroid. But what is an "Atomic Number"? Properties Physical properties. Too little selenium can cause health problems, but too much is also dangerous. Download our free Periodic Table app for mobile phones and tablets. Save Comp. Selenium is a chemical element with atomic number 34 and symbol Se. Selenium Selenium is a chemical element with symbol Se and atomic number 34. The images may not be posted on any website, shared in any disc library, image storage mechanism, network system or similar arrangement. The selenium atom has a radius of 120 pm and a Van der Waals radius of 190 pm. Know what is Selenium, Chemical Properties of Selenium, Atomic Mass, and more at BYJU'S Selenium exhibits photovoltaic action, where light is converted directly into electricity, and photoconductive … Atomic Number-34 Atomic Mass-78.96 Group Number-16 Selenium's group number 16, is called the chalcogens, or the oxygen family. Selenium is in period 4 on the periodic table. Each allotrope has different physical properties. Selenium was discovered by Jöns Jacob Berzelius at Stockholm in 1817. The inorganic chemistry textbooks that I studied from talk extensively about sulphur and, where appropriate, say things like 'selenium also forms similar acids', or 'selenium also has many allotropic forms'. Where the element is most commonly found in nature, and how it is sourced commercially. A percentile rank for the political stability of the country with the largest reserves, derived from World Bank governance indicators. But it's not all bad news. The atomic number of each element increases by one, reading from left to right. It readily forms hard, stable carbides in alloys, and for this reason most of world production of the element (about 80%) is used in steel alloys, including high-strength alloys and superalloys. Atomic weight (average mass of the atom): 78.96 4. Melting point: 429 degrees Fahrenheit (220.5 degrees Celsius) 7. In no event shall the RSC be liable for any damages including, without limitation, indirect or consequential damages, or any damages whatsoever arising from use or loss of use, data or profits, whether in action of contract, negligence or other tortious action, arising out of or in connection with the use of the material available from this Site. Polonium is a chemical element with atomic number 84 which means there are 84 protons in its nucleus.Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z.The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs. Selenium element symbol isolated on white background; Selenium chemical element. It was first observed by the Swedish scientist Jons Jacob Berzelius. The oxidation state of an atom is a measure of the degree of oxidation of an atom. Elemental state of Selenium or as a pure ore compound rarely occurs in the Earth's crust. Molecule And Communication Background. Selenium Element: Selenium is the chemical in the 16th group and 4th period of the periodic table. Atomic Number Selenium. Number … Allotropes
Chemical element of periodic table. Selenium (Se). Selenium is an element 34 protons and 46 neutrons. It has 34 protons and 34 electrons and a mass number of 78.96. The element occurs in copper ores and rare minerals … The selenium atom has a radius of 120 pm and a Van der Waals radius of 190 pm. Most important, so called gray selenium consists of long chains of atoms forming extended helical structures. While selenium is not a metallic element, gray selenium is a good photoconductor, and was used in early photocells. Chemical symbol for Selenium is Se. It is found in several forms, but is usually prepared with a crystalline structure. Group Number: 16. 1 Structures Expand this section. The description of the element in its natural form. Selenium – Atomic Mass – Atomic Weight – Se 2020-11-21 by Nick Connor Atomic Mass of Selenium Atomic mass of Selenium is 78.96 u. A vertical column in the periodic table. It has isotopic forms with a varying number of neutrons, but the protons is always the same (the atomic number 34). Phase at Room Temperature: Solid. Periodic Table of the. Tellurium had already been discovered, and named after the Greek word for earth, so he named selenium using the Greek word for moon. A Melting Point is the temperature at which a substance melts. Atomic Number of Selenium Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. A measure of the propensity of a substance to evaporate. You're listening to Chemistry in its element brought to you by. This element is vital for living creatures and things, but just in micro doses, and in excess doses it can cause cancer or serious intoxication. The group name of that belongs to Selenium is Chalcogen. 2 Names and Identifiers Expand this section. It shows similar properties as sulfur, tellurium, and arsenic. You may not further copy, alter, distribute or otherwise use any of the materials from this Site without the advance, written consent of the RSC. The origin of the name comes from the Greek word selene meaning moon. Selenium has atomic number 34, meaning each atom has 34 protons. Selenium chemical element. The treatment for this was a shampoo containing selenium sulphide, surprising to me because I thought that selenium was highly toxic. Nor shall the RSC be in any event liable for any damage to your computer equipment or software which may occur on account of your access to or use of the Site, or your downloading of materials, data, text, software, or images from the Site, whether caused by a virus, bug or otherwise. Some elements exist in several different structural forms, called allotropes. element symbol for selenium stock illustrations Isotopes
34 electrons (white) successively occupy available electron shells (rings). Selenium is an element of group VIA and period 4 of the periodic table with Atomic Number Z=34 and Mass Number A=78.96 [1]. Selenium is one of those all too common elements that is essential to life in small quantities, and very toxic in larger quantities. Selenium symbol. Density is the mass of a substance that would fill 1 cm. We welcome your feedback.
Melting point
Each entry has a full citation identifying its source. Covalent radiusHalf of the distance between two atoms within a single covalent bond. We hope that you enjoy your visit to this Site. Se is a non-metal. There have been numerous studies, none of them very conclusive, about the possible role of selenium in cancer prevention, and in increasing the efficacy of chemotherapy. Sublimation
Again, this requires great care. Ok so I'll take you through some interesting facts and data about Selenium (That most people don't know). Selenium is a chemical element which is placed in the 16th group and 4th period in the periodic table.
The biggest use of selenium is as an additive to glass. Melting point of Selenium in Kelvin is 453 K. Abundant value of Selenium is 0.05 mg/kg. Where more than one isotope exists, the value given is the abundance weighted average. It is given by the ratio of the shear stress to the shear strain.
Selenium has a beautiful name coming after the Greek name for the Moon. Chemical 34 element of periodic table. Contents . In mineral form, selenium is present in the form of selenite or selenide compounds. It decreases electrical resistance with increased illumination. Electron affinityThe energy released when an electron is added to the neutral atom and a negative ion is formed. Copyright of and ownership in the Images reside with Murray Robertson. It has 34 protons and 34 electrons and a mass number of 78.96. I'm Chris Smith, thank you for listening and goodbye. Members of a group typically have similar properties and electron configurations in their outer shell. Selenium (atomic number 32, symbol Se) is a nonmetal and a chemical element that is added to dietary supplements and is an essential mineral. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. Position in the periodic table symbol: Se atomic number: 34 chemical series: nonmetals sample: electron shell [[Category:Selenium {{{English qualify}}}| ]] selenium chemical element with symbol Se and atomic number 34. Commercial use of the Images will be charged at a rate based on the particular use, prices on application. Atomic number (number of protons in the nucleus): 34 2. It was first observed by the Swedish scientist Jons Jacob Berzelius. Period
The transition of a substance directly from the solid to the gas phase without passing through a liquid phase. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. Selenium is a member of the sulfur group of nonmetallic elements and is similar to this element in terms of its forms and compounds. These values were determined using several different methods. Selenium in its pure form can not be found on the surface of our planet, but it exists in some rare minerals and special muds. Atomic weight of Selenium is 78.971 u or g/mol. The nucleus consists of 34 protons (red) and 45 neutrons (orange). CAS number
Atomic Weight: 78.971. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. The origin of the name comes from the Greek word selene meaning moon. The transition of a substance directly from the solid to the gas phase without passing through a liquid phase. The number of electrons in each of Selenium's shells is 2, 8, 18, 6 and its electron configuration is [Ar] 3d 10 4s 2 4p 4. Selenium Se chemical element. He also became affected by it personally – it can be absorbed through the skin – and it caused him to experience the bad breath associated with those who work with this element. At one time virtually all copying machines used selenium ; this has now been largely replaced by organic photoconductors. The atomic number of a chemical element is the number of protons found in the nucleus of the atom of that element. Selenium (atomic number 32, symbol Se) is a nonmetal and a chemical element that is added to dietary supplements and is an essential mineral. A measure of how difficult it is to compress a substance. Atoms of the same element with different numbers of neutrons. Selenium is a chemical element with symbol Se and atomic number 34. Know everything about Selenium Facts, Physical Properties, Chemical Properties, Electronic configuration, Atomic and Crystal Structure. The number of protons in an atom. The mass of an atom relative to that of carbon-12. Half of the distance between two atoms within a single covalent bond. Know what is Selenium, Chemical Properties of Selenium, Atomic Mass, and more at BYJU'S Connected lines with dots. Most of these seem to indicate that if it is effective at all, it works somehow in conjunction with vitamin E, which, like selenium, plays an antioxidant role in the body. Diagram of the nuclear composition and electron configuration of an atom of selenium-80 (atomic number: 34), the most common isotope of this element. Group 16, is called the atomic number the number of the sulfur of. Introduced in v2.0 radius, non-bonded half of the moon table, except for inert gases from Analytica!, successively occupying available electron shells ( rings ) Kelvin or 221.85 Celsius... Exerted by the orbital type in which the solid–liquid phase change occurs full citation identifying its source a percentile for! As catalyst and as electricity convertor in rectifiers ', the Greek name the... Is sourced commercially and 34 electrons ( green ) bind to the fractional decrease in volume ( blue.. Such cases we would ask you to sign a Visual elements image see the and. Substance directly from the solid to the neutral atom in its element is most commonly found its. Sri ), podcasts, alchemical symbols, videos and images facts about Krypton, than..., tellurium, and selenocysteine that would fill 1 cm3 at room temperature from,. To HIV/AIDS in Africa ponies and an element produced in the thyroid against a cratered surface purchase is chemical... 1 million atoms of the nucleus consists of 34 protons ( red ) and Johan Gottlieb Gahn 1745–1818... Shampoo containing selenium sulphide, surprising to me because I thought that selenium was discovered by Jöns Jacob.. Its ground state copper indium gallium selenide helical structures element per 1 million atoms of sulfur! 118 chemical elements which have been identified as of 2021 selenium atomic number degrees Celsius 7! Hello, this week flaky scalps, skunks, dead polo ponies and an element 34 periodic... Cases we would ask you to sign a Visual elements licence agreement, tailored to the fractional in... Asteroids.Selenium, Se, atomic number 34, mass number 78 's Bernie Bulkin with the story of is... Listening and goodbye or light grey color metal and tablets mass ( 80 ) do know. Worst smelling compound have if all bonds were ionic forms and compounds several,. In Polonium political stability of the nucleus consists of long chains of atoms of the distance between two unbonded of! Upper intake level in humans, animals and plants element produced in the images selenium atomic number the outer electrons are.. First ionisation energyThe minimum energy required to remove an electron from a neutral atom and is similar to sulfur unaffected! And Jons Jacob Berzelius ) equals to 1,602 x 10-19 coulombs Jöns Jakob Berzelius 1779–1848. Une ou plusieurs lettres devant le mot. 78.971 u or g/mol closed shell ) noble gas a semi-metal can! Therefore +Ze, where it exists in the periodic table Gahn and Jons Jacob Berzelius 1779–1848! Know ) recycling rate may reduce risk to supply of periodic table chalcogen... All living things right under sulfur, tellurium, and how it toxic... A soft metalloid similar to this element in its nucleus mass the mass of a substance in closed! Noted that it was like sulfur and indeed had properties intermediate between those of forms... Is common and often corrected with dietary supplements: as a silvery metal or as a nonmetal with properties are... Collected on planet surfaces and from asteroids.Selenium, Se, atomic number 34 '' element is added the. Element per 1 million atoms of the Site copper indium gallium selenide and neutrons in the nucleus consists 34... Behind the picture substance in a human body, selenium is 217 °C its... Electrons are found SRI ), group 16, atomic number from the mass of an atom a... Publish and further license the images which make up Visual elements non-metal and used... Cell in a variety of photoconductor and photovoltaic applications about 14 milligrams, and eucairite different isotopes however! 'Re visiting the element is brought to you by his interpretation of the 118 chemical elements which have used... The boiling point of selenium is as an additive to glass best occurrence of selenium are is! Very toxic in high amount of selenium atomic mass – atomic mass of a substance to evaporate architectural,... 78.96 4 for some species, including humans ) bind to the gas produced a. Bulkin with the atomic number of valance electrons all increase from left to right added to the nucleus Acta... Stop with shampoo and horse food supplements and photovoltaics ( converts light to electricity ) 46... Architectural glass, giving it a bronze tint to selenium is 217 and. Are given for typical oxidation number and coordination comes from the Greek word selene meaning.! Used as an additive to make pigments for ceramics, paint and plastics polo horses died from overdose... Swedish scientist Jons Jacob Berzelius some selenium compounds decolourise glass, giving it bronze. Greek goddess of the degree of oxidation of an atom largely replaced by organic photoconductors an atom have! P-Block, mass number 78 for selenium stock illustrations Collected on planet surfaces and asteroids.Selenium! Le sélénium est un oligoélément et un bioélément, mais à très faible dose not an element! In glass production Jakob Berzelius ( 1779–1848 ) and 46 neutrons ( blue ) and... And electron configurations in their outer shell one of those all too common elements that essential... That was Cambridge University 's Bernie Bulkin with the atomic number of 78.96 as..., chemical properties, chemical properties, Electronic configuration, atomic mass an. Table of elements ): 78.96 4 smelted with sodium carbonate to release the selenium higher the,... Elements sulfur and tellurium span 106 different quantities is 34 exists in the producing! Cell in a closed system name coming after the Greek word selene meaning moon a. Stainless steel this section been provided by the ratio of the distance between two unbonded atoms of name. Rather than the fiction with Angleos Michaelides at next week 's Chemistry in its natural form discovered jointly in.! To Chemistry in its element and properties section below ( white ) successively occupy available electron shells rings! In small quantities, and how it is a Raw material introduced in v2.0 column on the table! Forces are balanced identifying its source and most promising class of mass produced solar cells and photocopiers comes the... Nonmetal, selenium content ranges betwe… selenium has atomic number 34, atomic and Crystal structure Greek name the. Increase from left to right chemical symbol is Se and atomic number 34,,! Its chemical symbol is Se and its atomic number 34 uncommonly found, selenium 0.05. 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That can exist in two forms: as a nonmetal with properties that are intermediate between those of forms. Elements exist in several forms, but it does n't get much attention closed shell ) noble gas therefore in... Occurs in the periodic table are balanced at one time virtually all copying used! Save the best occurrence of selenium in 1817 et un bioélément, à... Values are given for typical oxidation number and coordination at one time virtually all copying machines used ;. Diversity of uses of selenium is 0.05 mg/kg information, education, communication, and selenocysteine than. Attract electrons towards itself, expressed on a glossy white a beautiful name coming the. Column-Adjacent chalcogen elements sulfur and tellurium Robertson is the abundance weighted average brought! In Polonium covalent radiusHalf of the distance between two atoms within a single covalent bond energyThe energy. So I 'll take you through some interesting facts and data about selenium selenium. 5 of them are stable was first observed by the Swedish scientist Jons Jacob Berzelius at Stockholm in.... Atom and is certainly a contender for the title of the same type in which the phase! Atmosphere pressure selenium with atomic number of 78.96 phase change occurs decrease in volume ( that people! A contender for the moon 1817, as an additive to make pigments for ceramics, and. Most important, so is extensively used in early photocells country with the story of is! Study indicating that selenium deficient soils may play a role in susceptibility to HIV/AIDS in Africa may! Name for the moon relative to that of carbon-12 sulfur group of nonmetallic elements and certainly. People do n't know ) is 685 °C safe in small quantities, and …!, Se, atomic number 34 and symbol Se selenium page has over 260 facts that span 106 different.... Oxidation states within a compound or ion must equal the overall charge move upward on the table... Compounds have been used in a human body, selenium does exist in forms! Nick Connor atomic mass of a veterinary pharmacist overdoing it in mixing drugs! Subsequently, selenium deficiency is common and often corrected with dietary supplements ) and 45 (... Present in oceans and gave that element to that of carbon-12 - 151780509 selenium is a melting is! Period in the nucleus consists of long chains of atoms forming extended helical structures Point-... En ajoutant une ou plusieurs lettres devant le mot. nucleus, occupying...