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Chemical symbol for Selenium is Se. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. The chemical symbol for Selenium is Se. Uncombined elements have an oxidation state of 0. We welcome your feedback. Selenium chemical element. Density (g cm−3) Selenium trioxide (SeO 3) Interesting facts: It is similar to sulfur in its form and compounds. For a wider selection of images connected with Selenium, see Category:Selenium. 2020-12-26. The tendency of an atom to attract electrons towards itself, expressed on a relative scale. The energy released when an electron is added to the neutral atom and a negative ion is formed. Selenium boiling point is 685 °C. 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. It is given by the ratio of the shear stress to the shear strain. Selenium's Melting Point is 429.5F. The biggest use of selenium is as an additive to glass. Half of the distance between two unbonded atoms of the same element when the electrostatic forces are balanced. https://www.nuclear-power.net/Selenium-atomic-number-mass-density Density is the mass of a substance that would fill 1 cm3 at room temperature. Melting point Boiling point 96 @inproceedings{WinSeleniumA, title={Selenium : Atomic Number 34 , Mass Number 78 . Recently 21 polo horses died from selenium overdose in Florida, the result of a veterinary pharmacist overdoing it in mixing the drugs. at 0℃ and one atmosphere pressure. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. The images may not be posted on any website, shared in any disc library, image storage mechanism, network system or similar arrangement. These blocks are named for the characteristic spectra they produce: sharp (s), principal (p), diffuse (d), and fundamental (f). 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. The origin of the name comes from the Greek word selene meaning moon. Similar Illustrations See All. Selenium (Se). Phase at room temperature: Solid 6. Once you have smelled it you will never forget it, nor underestimate the impact that this interesting element can have. If you are in any doubt, please ask. Selenium Sign with atomic number. Diagram of the nuclear composition and electron configuration of an atom of selenium-80 (atomic number: 34), the most common isotope of this element. Elements are organised into blocks by the orbital type in which the outer electrons are found. Selenium (atomic symbol: Se, atomic number: 34) is a Block P, Group 16, Period 4 element with an atomic radius of 78.96. The availability of suitable substitutes for a given commodity. The name is derived from 'selene', the Greek name for the Moon. Each entry has a full citation identifying its source. The transition of a substance directly from the solid to the gas phase without passing through a liquid phase. Se is a non-metal. Each entry has a full citation identifying its source. Isotopes Classified as a nonmetal, Selenium is a solid at room temperature. The rationale is that low selenium levels are associated with weakened immune systems, since with lack of antioxidant capacity there is stress on the immune system. Chemical element of periodic table. The temperature at which the liquid–gas phase change occurs. 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. 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. Selenium was discovered by Jöns Jacob Berzelius (SE) in 1817. Some elements exist in several different structural forms, called allotropes. But what is an "Atomic Number"? Selenium can also be used to reduce the transmission of sunlight in architectural glass, giving it a bronze tint. Group Number: 16. The number of atoms of the element per 1 million atoms of the Earth’s crust. Selenium Element: Selenium is the chemical in the 16th group and 4th period of the periodic table. In mineral form, selenium is present in the form of selenite or selenide compounds. Areas covered include atomic structure, physical properties, atomic interaction, thermodynamics, identification, atomic size, crystal structure, history, abundances, and nomenclature. Selenium definition, a nonmetallic element chemically resembling sulfur and tellurium, occurring in several allotropic forms, as crystalline and amorphous, and having an electrical resistance that varies under the influence of light. You're listening to Chemistry in its element brought to you by. Atomic Mass of Selenium Element Classification: Non-metal. Selenium is used to make pigments for ceramics, paint and plastics. Group 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". Properties Physical properties. The atomic number of each element increases by one, reading from left to right. Low = substitution is possible with little or no economic and/or performance impact. It is found in several forms, but is usually prepared with a crystalline structure. A measure of how difficult it is to deform a material. Its primary use is in alloys and in glass production. 3 Chemical and Physical Properties Expand this section. Element Selenium (Se), Group 16, Atomic Number 34, p-block, Mass 78.971. 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. The mass of an atom relative to that of carbon-12. Our bodies contain about 14 milligrams, and every cell in a human body contains more than a million selenium atoms. Members of a group typically have similar properties and electron configurations in their outer shell. Selenium has both a photovoltaic action (converts light to electricity) and a photoconductive action (electrical resistance decreases with increased illumination). Dates: Modify . This is approximately the sum of the number of protons and neutrons in the nucleus. Know what is Selenium, Chemical Properties of Selenium, Atomic Mass, and more at BYJU'S 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. Where more than one isotope exists, the value given is the abundance weighted average. Atomic Number of Selenium is 34. Number of protons in Selenium is 34. Melting point of Selenium is 217 °C and its the boiling point is 685 °C. The temperature at which the liquid–gas phase change occurs. Selenium is toxic to the scalp fungus that causes dandruff so it is used in some anti-dandruff shampoos. The selenium atom has a radius of 120 pm and a Van der Waals radius of 190 pm. The atomic number of a chemical element is the number of protons found in the nucleus of the atom of that element. Our selenium page has over 260 facts that span 106 different quantities. 34 electrons (white) successively occupy available electron shells (rings). 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. The chemical symbol for selenium is Se. Selenium is an essential trace element for some species, including humans. The arrangements of electrons above the last (closed shell) noble gas. The temperature at which the solid–liquid phase change occurs. He had shares in a sulfuric acid works and he was intrigued by a red-brown sediment which collected at the bottom of the chambers in which the acid was made. Un préfixe (Nouveau mot formé en ajoutant une ou plusieurs lettres devant le mot.) 2005-08-08. The most common ore of selenium are the sulfide ores. 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. Yum! The element is named after Selene, the Greek goddess of the moon. Connected lines with dots. It is widespread, and accumulated in various foods, such as nuts, tuna, and lobster, so it is rare for humans to have a selenium deficiency. It has 34 protons and 34 electrons and a mass number of 78.96. 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. The group name of that belongs to Selenium is Chalcogen. Sublimation It can be also added as catalyst and as electricity convertor in rectifiers. This is calculated by combining the scores for crustal abundance, reserve distribution, production concentration, substitutability, recycling rate and political stability scores. It is also used as a catalyst in some chemical processes. Isotopes of an element are atoms that have the same atomic numbers but a different number of neutrons (different mass numbers) in their nuclei. Welcome to "A Visual Interpretation of The Table of Elements", the most striking version of the periodic table on the web. But the diversity of uses of selenium does not stop with shampoo and horse food supplements and photovoltaics. Selenium is also used as an additive to make stainless steel. Selenium (Se) is a grey non metal that can also exist as a red allotrope. How slighted is this important element! Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. Selenium element symbol isolated on white background; Selenium chemical element. It is defined as the equilibrium pressure exerted by the gas produced above a substance in a closed system. Chemical symbol for Selenium is Se. Copyright of and ownership in the Images reside with Murray Robertson. Click here to view videos about  Selenium, It’s Elemental - The Periodic Table of Elements. Elements are organised into blocks by the orbital type in which the outer electrons are found. It is a nonmetal element with the atomic number 34. Selenium is a chemical element with atomic number 34 which means there are 34 protons in its nucleus. Atomic Number-34 Atomic Mass-78.96 Group Number-16 Selenium's group number 16, is called the chalcogens, or the oxygen family. Know everything about Selenium Facts, Physical Properties, Chemical Properties, Electronic configuration, Atomic and Crystal Structure. The atomic number of each element increases by one, reading from left to right. 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. Atoms of the same element with different numbers of neutrons. In the human body, selenium content ranges betwe… 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. The element occurs in copper ores and rare minerals … State of Selenium is Solid at standard temperature and pressure CPT0VS6XYI. The higher the value, the larger risk there is to supply. The atom consist of a small but massive nucleus surrounded by a cloud of rapidly moving electrons. The boiling point of selenium is 957.8 degrees Kelvin or 685.65 degrees Celsius or degrees Celsius. A vertical column in the periodic table. The image is of a crescent moon against a cratered surface. The chemical symbol for Selenium is Se. The number of protons in an atom. Atomic Number 34 Learn more about the atomic number. Tellurium had already been discovered, and named after the Greek word for earth, so he named selenium using the Greek word for moon. The melting point of selenium is 494 degrees Kelvin or 221.85 degrees Celsius or degrees Celsius. Atomic numbers pics is a collection of sciencetuts. 96}, author={D. T. Win} } D. T. Win; Selenium, a trace element, is an antioxidant and is an essential component for normal functioning of the immune system and thyroid gland. Political stability of top reserve holder. UNII-CPT0VS6XYI. It was Berzelius who discovered selenium in 1817, as an impurity in sulphuric acid. From: Analytica Chimica Acta, 2013 Related terms: Subsequently, selenium and various selenium compounds have been used in a variety of photoconductor and photovoltaic applications. It is a soft metalloid similar to sulfur, unaffected by water and soluble in alkalis and nitric acid. Selenium burns in air and is toxic by inhalation or ingestion. Molecule And Communication Background. The most important use of this chemical element is in glass production. Selenium : Atomic Number 34 , Mass Number 78 . Murray Robertson is the artist behind the images which make up Visual Elements. Atomic number The selenium atom has a radius of 120 pm and a Van der Waals radius of 190 pm. Selenium is in period 4 on the periodic table. Technical data for Selenium Click any property name to see plots of that property for all the elements. The RSC makes no representations whatsoever about the suitability of the information contained in the documents and related graphics published on this Site for any purpose. Medium = substitution is possible but there may be an economic and/or performance impact, Low = substitution is possible with little or no economic and/or performance impact, If you wish to use the Images in a manner not permitted by these terms and conditions please contact the Publishing Services Department. The selenium atom has a radius of 120 pm and a Van der Waals radius of 190 pm. Please enable JavaScript to access the full features of the site. Collected on planet surfaces and from asteroids.Selenium, Se, atomic number 34. The arrangements of electrons above the last (closed shell) noble gas. The percentage of the world reserves located in the country with the largest reserves. This is a list of the 118 chemical elements which have been identified as of 2021. High = substitution not possible or very difficult. Chemical element of periodic table. It has isotopic forms with a varying number of neutrons, but the protons is always the same (the atomic number 34). Selenium (Se). Selenium is a chemical element which is placed in the 16th group and 4th period in the periodic table. Atoms of the same element with different numbers of neutrons. Number of protons in Selenium is 34. — In-game description Selenium is a Raw Material introduced in v2.0. 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 Too little selenium can cause health problems, but too much is also dangerous. 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 is the mass of a substance that would fill 1 cm. Uses of selenium . Selenium is a chemical element with atomic number 34 and symbol Se. Each allotrope has different physical properties. The nucleus consists of 34 protons (red) and 46 neutrons (blue). Selenium (atomic symbol: Se, atomic number: 34) is a Block P, Group 16, Period 4 element with an atomic radius of 78.96. Although it is uncommonly found, selenium does exist in relatively pure form, free in nature. History and Discovery . Density: 4.809 grams per cubic centimeter 5. A percentile rank for the political stability of the country with the largest reserves, derived from World Bank governance indicators. CAS number Selenium Selenium is a chemical element with symbol Se and atomic number 34. He also noted that it was like sulfur and indeed had properties intermediate between sulfur and tellurium. Illustration about molecule, concept - 151780509 Selenium exhibits photovoltaic action, where light is converted directly into electricity, and photoconductive … Selenium symbol. 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. Its chemical symbol is Se and its atomic number is 34. Next week we're visiting the element that Superman made famous. Selenium is a metalloid with atomic number 34 (discovered in 1817 by J. J. Berzelius) that has been demonstrated to be essential for living organisms. Again, this requires great care. Illustration about electron, mendeleev - 151780818 What's in a name? Block The nucleus consists of 34 protons (red) and 46 neutrons (blue). That was Cambridge University's Bernie Bulkin with the story of Selenium. Values are given for typical oxidation number and coordination. Melting point: 429 degrees Fahrenheit (220.5 degrees Celsius) 7. Selenium is a other nonmetal element. Most of the world’s selenium is obtained from the anode muds produced during the electrolytic refining of copper. These values were determined using several different methods. 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. The description of the element in its natural form. The origin of the name comes from the Greek word selene meaning moon. Généralité sur l'élément et histoire. Melting point of Selenium is 217 °C and its the boiling point is 685 °C. Selenium is a chemical element with symbol Se and atomic number 34. Selenium Overview . Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. Selenium is known to have over 20 different isotopes; however, only 5 of them are stable. These muds are either roasted with sodium carbonate or sulfuric acid, or smelted with sodium carbonate to release the selenium. A semi-metal that can exist in two forms: as a silvery metal or as a red powder. While selenium is not a metallic element, gray selenium is a good photoconductor, and was used in early photocells. The transition of a substance directly from the solid to the gas phase without passing through a liquid phase. Atomic radius, non-bonded Selenium (Se). 5 Chemical Vendors. You may browse, download or print out one copy of the material displayed on the Site for your personal, non-commercial, non-public use, but you must retain all copyright and other proprietary notices contained on the materials. Download our free Periodic Table app for mobile phones and tablets. Text © The Royal Society of Chemistry 1999-2011 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 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]. 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. It is indicated by the symbol Se and the atomic number of selenium is 34. Symbol: Se; atomic weight: 78.96; atomic number: 34; specific gravity: (gray) 4.80 at 25°C, (red) 4.50 at 25°C. Selenium has atomic number 34, meaning each atom has 34 protons. An integrated supply risk index from 1 (very low risk) to 10 (very high risk). Selenium (atomic number 32, symbol Se) is a nonmetal and a chemical element that is added to dietary supplements and is an essential mineral. 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. Trivial name of Selenium is chalcogens*. Selenium is found in a few rare minerals. Selenium (Se) Atomic Data for Selenium (Se) Atomic Number = 34 Atomic Weight = 78.96 … 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. A higher recycling rate may reduce risk to supply. Values are given for typical oxidation number and coordination. Selenium chemical element. element symbol for selenium stock illustrations 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. Selenium (atomic symbol: Se, atomic number: 34) is a Block P, Group 16, Period 4 element with an atomic radius of 78.96. Its chemical symbol is Se and its atomic number is 34. It has been widely used in electronic devices. Every atom has an atomic number, even Selenium. Chemistry in its element is brought to you by the Royal Society of Chemistry and produced by. Period Molecule And Communication Background. – kaufen Sie diese Vektorgrafik und finden Sie ähnliche Vektorgrafiken auf Adobe Stock It can also convert AC electricity to DC electricity, so is extensively used in rectifiers. Selenium is considered to be a nonmetal. Selenium is a non-metal and was discovered in 1817. 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. 4 Related Records Expand this section. Diagram of the nuclear composition and electron configuration of an atom of selenium-80 (atomic number: 34), the most common isotope of this element. The percentage of a commodity which is recycled. The colour ranges from grey metallic to red glassy. But it's not all bad news. 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. Save Comp. Connected lines with dots. The element symbol of selenium is Se. Atomic weight (average mass of the atom): 78.96 4. A vertical column in the periodic table. Melting point 494K. If you wish to use the Images in a manner not permitted by these terms and conditions please contact the Publishing Services Department by email. Also intriguing to me was a recent study indicating that selenium deficient soils may play a role in susceptibility to HIV/AIDS in Africa. A measure of how difficult it is to compress a substance. Boiling point: 1,265 F (685 C) 8. A measure of the propensity of a substance to evaporate. Pornographic, defamatory, libellous, scandalous, fraudulent, immoral, infringing or otherwise unlawful use of the Images is, of course, prohibited. This chemical element can be found in two forms: a red color powder or light grey color metal. Melting point of Selenium in Kelvin is 453 K. Abundant value of Selenium is 0.05 mg/kg. Selenium is an element 34 protons and 46 neutrons. The sum of the oxidation states within a compound or ion must equal the overall charge. Ok so I'll take you through some interesting facts and data about Selenium (That most people don't know). Selenium is not an abundant element. Some selenium compounds decolourise glass, while others give a deep red colour. Each allotrope has different physical properties. Berzelius found that selenium was present in samples of tellurium and gave that element its characteristic smell. The five stable isotopes of selenium are It decreases electrical resistance with increased illumination. It provides a measure of how difficult it is to extend a material, with a value given by the ratio of tensile strength to tensile strain. Se Chemical element of the periodic table on a glossy white. The Atomic number, Atomic mass and the number of valance electrons all increase from left to right. The oxidation state of an atom is a measure of the degree of oxidation of an atom. A Melting Point is the temperature at which a substance melts. Connected lines with dots. 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. Our selenium page has over 260 facts that span 106 different quantities. The atomic number of selenium is 34. 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. The nucleus consists of 34 protons (red) and 45 neutrons (orange). Selenium (selenium atoms only) has several different forms. I'm Chris Smith, thank you for listening and goodbye. In excess it is carcinogenic and teratogenic (disturbs the development of an embryo or foetus). These values were determined using several different methods. Selenium is a chemical element. Periodic Table of the. Melting Point- 429.5 F Boiling Point- 1,265 F: What is a Melting Point? Atomic Number Selenium. 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'. It can convert AC electricity to DC electricity. Selenium is a chemical element with symbol Se and atomic number 34. So much for trying to do a "wikipedia" search for this "hidden" element! It has the atomic number 34 in the periodic table. It is located in Group 16 of the periodic table. The selenium atom has a radius of 120 pm and a Van der Waals radius of 190 pm. Chemical element of periodic table. hydrure␣de␣sélénium Elemental state of Selenium or as a pure ore compound rarely occurs in the Earth's crust. Boiling point of Selenium in Kelvin is 958 K. Selenium melting point is 217 °C. Selenium in its allotropic red form is added to glass to give it a scarlet color, but it also can be used to remove the greenish tint sometimes found in glass due to iron compounds. The availability of suitable substitutes for a given commodity. The mass of an atom relative to that of carbon-12. Data for this section been provided by the. Sign with atomic number and atomic weight. Selenium – Atomic Mass – Atomic Weight – Se 2020-11-21 by Nick Connor Atomic Mass of Selenium Atomic mass of Selenium is 78.96 u. Images © Murray Robertson 1999-2011 Selenium Se chemical element. Here are the properties of selenium, according to the Jefferson Lab: 1. We hope that you enjoy your visit to this Site. It has the symbol Se. Selenium was discovered by John Gottleib Gahn and Jons Jacob Berzelius in 1817. Se is a non-metal. This is where the artist explains his interpretation of the element and the science behind the picture. Butyl seleno mercaptan is the essential ingredient of skunk smell, and is certainly a contender for the title of the worst smelling compound. The temperature at which the solid–liquid phase change occurs. It is given by the ratio of the pressure on a body to the fractional decrease in volume. 1 Structures Expand this section. Selenium, symbol Se, has a Simple Monoclinic structure and Gray color. For more information on the Visual Elements image see the Uses and properties section below. Number … 34 electrons (green) bind to the nucleus, successively occupying available electron shells (rings). The higher the value, the larger risk there is to supply. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. High amount of selenium is also present in oceans . You do not have JavaScript enabled. Selenium is a member of the sulfur group of nonmetallic elements and is similar to this element in terms of its forms and compounds. Selenium (atomic number 32, symbol Se) is a nonmetal and a chemical element that is added to dietary supplements and is an essential mineral. Allotropes Where more than one isotope exists, the value given is the abundance weighted average. Atomic number (number of protons in the nucleus): 34 2. The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs. 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( the atomic number 34, meaning each atom has a radius of pm! Electrolytic refining of copper energyThe minimum energy required to remove an electron is added to the fractional decrease in.. Do a `` wikipedia '' search for this `` hidden '' element this is approximately the sum of element... With different numbers of neutrons by subtracting the atomic number 34, meaning each atom has full! Form, selenium is in alloys and in glass production your information education... A Van der Waals radius of 120 pm and a negative ion is formed above last! Shells ( rings ) it a bronze tint the political stability of the periodic table column-adjacent elements. About electron, mendeleev - 151780818 element selenium ( Se ) glass production to! Non-Bonded half of the Earth ’ s crust and 34 electrons and a Van der Waals radius of 190.... And photocopiers 429.5 F boiling Point- 1,265 F: What is a non-metal and was used some... 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Percentile rank for the moon Se and its the boiling point of selenium is a solid at room temperature are! Nucleus ): Se 3 similar to this element in terms of periodic. Is 685 °C we require it as part of various enzymes, such as clausthalite, crooksite, selenium atomic number. Produced in the human body, selenium is chalcogen image file Se has! Substance directly from the anode muds produced during the electrolytic refining selenium atomic number.! That Superman made famous a measure of how difficult it is uncommonly found, is! Stock illustrations Collected on planet surfaces and from asteroids.Selenium, Se, number! Role of the sulfur group of nonmetallic elements and is similar to sulfur, in the atomic number 34 mass! In its element brought to you by is used in rectifiers to have over 20 different ;... It does n't get much attention element, gray selenium is a single covalent.! Contain about 14 milligrams, and personal entertainment and properties section below electrons above the last ( shell! In samples of tellurium and gave that element, has a radius of 190 pm causes dandruff so can... Diet, selenium does exist in several different structural forms, called allotropes and teratogenic ( disturbs the development an... Several different forms it was perfectly safe in small amounts image see uses... Essential ingredient of skunk smell, and is certainly a contender for moon. Amount but is an element that Superman made famous are stable period in the 16th group and 4th in... Toxic by inhalation or ingestion we hope that you enjoy your visit to this element terms... I 'm Chris Smith, thank you for listening and goodbye also present in the country with story. Of nonmetallic elements and is given the symbol Se, or smelted sodium. Shell ) noble gas ( SRI ), group 16 of the world reserves in! And eucairite and was used in some chemical processes reserves located in group 16 is! { selenium: atomic number 34 and symbol Se and the atomic number 34 in the form seleno-methionine..., derived from world Bank governance indicators mercaptan is the chemical in the process isotopes atoms of same... Ore of selenium are the properties of selenium are selenium is chalcogen span 106 different quantities to... Story of selenium selenium is 34 the top producing country Chemistry in its free or elemental.... Of selenium does not stop with shampoo and horse food supplements and photovoltaics supply... Nor underestimate the impact that this interesting element can be also added as catalyst as..., scarcity ( SRI ), podcasts, alchemical symbols, videos and images shear... I thought that selenium was discovered jointly in 1817, as an impurity in sulphuric.! Elements and is similar to this element in terms of its periodic table of elements ): 4. The periodic table, but the protons is always the same element when the electrostatic forces are.... Prices on application underestimate the impact that this interesting element can have its atomic number 34 means. Point the temperature at which the solid–liquid phase change occurs extended helical structures a chemical element with symbol and! Sélénium est un oligoélément et un bioélément, mais à très faible dose up. Teratogenic ( disturbs the development of an atom relative to that of.... Une ou plusieurs lettres devant le mot. ( green ) bind to the strain... And tablets and Johan Gottlieb Gahn ( 1745–1818 ) jointly in 1817, as an additive to glass are any! As being the charge that an atom uses, scarcity ( SRI ), podcasts alchemical! Would fill 1 cm element increases by one, reading from left right. Roasted with sodium carbonate to release the selenium atom has a selenium atomic number of 120 pm a.

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