selenium atomic number

Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. 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. Selenium, symbol Se, has a Simple Monoclinic structure and Gray color. The chemical symbol for Neptunium is Np. Krypton is a chemical element with atomic number 36 which means there are 36 protons and 36 electrons in the atomic structure. Selenium chemical element. Carbon is the 15th most abundant element in the Earth’s crust, and the fourth most abundant element in the universe by mass after hydrogen, helium, and oxygen. Selenium (Se). The number of electrons in each element’s electron shells, particularly the outermost valence shell, is the primary factor in determining its chemical bonding behavior. This website was founded as a non-profit project, build entirely by a group of nuclear engineers. Yum! The chemical symbol for Indium is In. The chemical symbol for Selenium is Se . Like the other metals of the platinum group, ruthenium is inert to most other chemicals. Selenium is a chemical element with symbol Se and atomic number 34. The nucleus is composed of protons and neutrons. Very soft and malleable, indium has a melting point higher than sodium and gallium, but lower than lithium and tin. It is indicated by the symbol Se and the atomic number of selenium is 34. Selenium is toxic to the scalp fungus that causes dandruff so it is used in some anti-dandruff shampoos. A horizontal row in the periodic table. Barium is the fifth element in group 2 and is a soft, silvery alkaline earth metal. The chemical symbol for Fluorine is F. Fluorine is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. Aluminum is a chemical element with atomic number 13 which means there are 13 protons and 13 electrons in the atomic structure. 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'. Tungsten is an intrinsically brittle and hard material, making it difficult to work. It is also used as a catalyst in some chemical processes. It is by mass the most common element on Earth, forming much of Earth’s outer and inner core. All of the alkali metals have a single valence electron in the outer electron shell, which is easily removed to create an ion with a positive charge – a cation, which combines with anions to form salts. The images may not be posted on any website, shared in any disc library, image storage mechanism, network system or similar arrangement. Se is a non-metal. He also noted that it was like sulfur and indeed had properties intermediate between sulfur and tellurium. Selenium (Se). An integrated supply risk index from 1 (very low risk) to 10 (very high risk). Hafnium is a lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals. Sélenium — Sélénium Sélénium Arsenic … Wikipédia en Français For more information on the Visual Elements image see the Uses and properties section below. You're listening to Chemistry in its element brought to you by. 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. Molybdenum is a chemical element with atomic number 42 which means there are 42 protons and 42 electrons in the atomic structure. Every atom has an atomic number, even Selenium. The chemical symbol for Technetium is Tc. Our Website follows all legal requirements to protect your privacy. Hafnium is a chemical element with atomic number 72 which means there are 72 protons and 72 electrons in the atomic structure. Sublimation The chemical symbol for Strontium is Sr. Strontium is an alkaline earth metal, strontium is a soft silver-white yellowish metallic element that is highly reactive chemically. The chemical symbol for Potassium is K. Potassium was first isolated from potash, the ashes of plants, from which its name derives. The chemical symbol for Arsenic is As. 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. Selenium 74 Metal is one of over 250 stable metallic isotopes produced by American Elements for biological and biomedical labeling, as … But the diversity of uses of selenium does not stop with shampoo and horse food supplements and photovoltaics. Cadmium is a chemical element with atomic number 48 which means there are 48 protons and 48 electrons in the atomic structure. Used in blueprints: 16x. Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. CAS number Mercury is a chemical element with atomic number 80 which means there are 80 protons and 80 electrons in the atomic structure. Under standard conditions, it is the lightest metal and the lightest solid element. Know what is Selenium, Chemical Properties of Selenium, Atomic Mass, and more at BYJU'S Boiling point The chemical symbol for Oxygen is O. Samarium is a chemical element with atomic number 62 which means there are 62 protons and 62 electrons in the atomic structure. Selenium (atomic symbol: Se, atomic number: 34) is a Block P, Group 16, Period 4 element with an atomic radius of 78.96. Selenium is not an abundant element. These have similar chemical properties, but palladium has the lowest melting point and is the least dense of them. The element occurs in copper ores and rare minerals … In nuclear reactors, promethium equilibrium exists in power operation. Vanadium is a chemical element with atomic number 23 which means there are 23 protons and 23 electrons in the atomic structure. 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. Cerium is the second element in the lanthanide series. 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 Atomic Number and Electronic Configuration Atomic number of selenium is 34. Too little selenium can cause health problems, but too much is also dangerous. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. The chemical symbol for Promethium is Pm. Strontium is a chemical element with atomic number 38 which means there are 38 protons and 38 electrons in the atomic structure. Neptunium is a chemical element with atomic number 93 which means there are 93 protons and 93 electrons in the atomic structure. A vertical column in the periodic table. Selenium Overview . Density is the mass of a substance that would fill 1 cm. The chemical symbol for Radium is Ra. It is given by the ratio of the shear stress to the shear strain. Cerium is a soft, ductile and silvery-white metal that tarnishes when exposed to air, and it is soft enough to be cut with a knife. This equilibrium also known as “samarium 149 reservoir”, since all of this promethium must undergo a decay to samarium. Tellurium is chemically related to selenium and sulfur. The RSC has been granted the sole and exclusive right and licence to produce, publish and further license the Images. The transition of a substance directly from the solid to the gas phase without passing through a liquid phase. Tellurium is far more common in the universe as a whole than on Earth. The chemical symbol for Yttrium is Y. Yttrium is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a “rare-earth element”. Density is the mass of a substance that would fill 1 cm3 at room temperature. Find Selenium Chemical Element Sign Atomic Number stock images in HD and millions of other royalty-free stock photos, illustrations and vectors in the Shutterstock collection. High = substitution not possible or very difficult. 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 temperature at which the solid–liquid phase change occurs. — In-game description Selenium is a Raw Material introduced in v2.0. Terbium is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife. Arsenic is a chemical element with atomic number 33 which means there are 33 protons and 33 electrons in the atomic structure. The chemical symbol for Carbon is C. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. Pure germanium is a semiconductor with an appearance similar to elemental silicon. Members of a group typically have similar properties and electron configurations in their outer shell. Selenium is also found in amino acids in living organisms, where it exists in the form of seleno-methionine, and selenocysteine . See also: Atomic Number – Does it conserve in a nuclear reaction? Selenium (atomic symbol: Se, atomic number: 34) is a Block P, Group 16, Period 4 element with an atomic radius of 78.96. Xenon is a chemical element with atomic number 54 which means there are 54 protons and 54 electrons in the atomic structure. Selenium is used to make pigments for ceramics, paint and plastics. Indeed, the newest and most promising class of mass produced solar cells are copper indium gallium selenide. Data for this section been provided by the. The chemical symbol for Astatine is At. Its primary use is in alloys and in glass production. High amount of selenium is also present in oceans . The chemical symbol for Helium is He. Thorium is a naturally-occurring element and it is estimated to be about three times more abundant than uranium. Niobium is a chemical element with atomic number 41 which means there are 41 protons and 41 electrons in the atomic structure. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. Copyright of and ownership in the Images reside with Murray Robertson. Chemistry in its element is brought to you by the Royal Society of Chemistry and produced by. Selenium is a member of the sulfur group of nonmetallic elements and is similar to this element in terms of its forms and compounds. Uncombined elements have an oxidation state of 0. 34 2) Write the full electron configuration for selenium following the (n+l) rule? It is toxic in high amount but is an essential micronutrient for all living things. It is even less abundant than the so-called rare earths. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Selenium is a other nonmetal element. Lawrencium is a chemical element with atomic number 103 which means there are 103 protons and 103 electrons in the atomic structure. Holmium is a chemical element with atomic number 67 which means there are 67 protons and 67 electrons in the atomic structure. Next week we're visiting the element that Superman made famous. Its properties are thus intermediate between those of chlorine and iodine. It is a soft, silvery-white alkali metal. It has 34 protons and 34 electrons and a mass number of 78.96. 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. Krypton is a member of group 18 (noble gases) elements. The chemical symbol for Thulium is Tm. Group The chemical symbol for Praseodymium is Pr. It is defined as being the charge that an atom would have if all bonds were ionic. Curium is a chemical element with atomic number 96 which means there are 96 protons and 96 electrons in the atomic structure. Technetium is a chemical element with atomic number 43 which means there are 43 protons and 43 electrons in the atomic structure. 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. effects: 3x. Please enable JavaScript to access the full features of the site. 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. Selenium is a non metal, sometimes considered a metalloid, rarely occurring in its elemental state on earth but mainly in the earth’s crust in sulfide ores. Selenium was discovered jointly in 1817 by Swedish chemists Jöns Jakob Berzelius (1779–1848) and Johan Gottlieb Gahn (1745–1818). We hope that you enjoy your visit to this Site. Lead has the highest atomic number of any stable element and concludes three major decay chains of heavier elements. Californium is an actinide element, the sixth transuranium element to be synthesized, and has the second-highest atomic mass of all the elements that have been produced in amounts large enough to see with the unaided eye (after einsteinium). The chemical symbol for Hydrogen is H. With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. Elements are organised into blocks by the orbital type in which the outer electrons are found. Selenium is most commonly produced from selenide in many sulfide ores, such as those of copper, silver, or lead. The chemical symbol for Vanadium is V. Vanadium is a hard, silvery grey, ductile, and malleable transition metal. The image is of a crescent moon against a cratered surface. Isotopes It is a member of the chalcogen group on the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. In the human body, selenium content ranges betwe… Nickel belongs to the transition metals and is hard and ductile. The chemical symbol for Iodine is I. Iodine is the heaviest of the stable halogens, it exists as a lustrous, purple-black metallic solid at standard conditions that sublimes readily to form a violet gas. Selenium is a non-metallic element that carries the chemical atomic number 34. Atomic Number – Does it conserve in a nuclear reaction? Discoverer: McMillan, Edwin M. and Abelson, Philip H. Discoverer: Glenn T. Seaborg, Joseph W. Kennedy, Edward M. McMillan, Arthur C. Wohl, Discoverer: Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso, Discoverer: Glenn T. Seaborg, Ralph A. James, Albert Ghiorso, Discoverer: Stanley G. Thompson, Glenn T. Seaborg, Kenneth Street, Jr., Albert Ghiorso, Discoverer: Stanley G. Thompson, Glenn T. Seaborg, Bernard G. Harvey, Gregory R. Choppin, Albert Ghiorso, Discoverer: Albert Ghiorso, Glenn T. Seaborg, Torbørn Sikkeland, John R. Walton, Discoverer: Albert Ghiorso, Torbjørn Sikkeland, Almon E. Larsh, Robert M. Latimer, Copyright 2020 Periodic Table | All Rights Reserved |. The chemical symbol for Iridium is Ir. Trivial name of Selenium is chalcogens*. 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 Discoverer: Scientists at Dubna, Russia (1964)/Albert Ghiorso et. Lanthanoids comprise the 15 metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium. We use cookies to ensure that we give you the best experience on our website. These blocks are named for the characteristic spectra they produce: sharp (s), principal (p), diffuse (d), and fundamental (f). The bulk properties of astatine are not known with any certainty. The chemical symbol for Titanium is Ti. These elements, along with the chemically similar elements scandium and yttrium, are often collectively known as the rare earth elements. … Gold is a transition metal and a group 11 element. In the periodic table, the elements are listed in order of increasing atomic number Z. Group Number: 16. Argon is the third-most abundant gas in the Earth’s atmosphere, at 0.934% (9340 ppmv). Zirconium is a lustrous, grey-white, strong transition metal that resembles hafnium and, to a lesser extent, titanium. Platinum is a chemical element with atomic number 78 which means there are 78 protons and 78 electrons in the atomic structure. Natural boron consists primarily of two stable isotopes, 11B (80.1%) and 10B (19.9%). Selenium is an essential trace element for some species, including humans. The percentage of a commodity which is recycled. Californium is a chemical element with atomic number 98 which means there are 98 protons and 98 electrons in the atomic structure. 34. Ruthenium is a rare transition metal belonging to the platinum group of the periodic table. So much for trying to do a "wikipedia" search for this "hidden" element! Rubidium is a soft, silvery-white metallic element of the alkali metal group, with an atomic mass of 85.4678. In nuclear industry gadolinium is commonly used as a neutron absorber due to very high neutron absorbtion cross-section of two isotopes 155Gd and 157Gd. The chemical symbol for Selenium is Se . Osmium is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores. Mendelevium is a chemical element with atomic number 101 which means there are 101 protons and 101 electrons in the atomic structure. Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name, kohl. Areas covered include atomic structure, physical properties, atomic interaction, thermodynamics, identification, atomic size, crystal structure, history, abundances, and nomenclature. Germanium is a chemical element with atomic number 32 which means there are 32 protons and 32 electrons in the atomic structure. Period. — In-game description Selenium is a Raw Material introduced in v2.0. Used for tech broker: 0x. Images © Murray Robertson 1999-2011 Lutetium is a chemical element with atomic number 71 which means there are 71 protons and 71 electrons in the atomic structure. The most common ore of selenium are the sulfide ores. A percentile rank for the political stability of the country with the largest reserves, derived from World Bank governance indicators. The temperature at which the liquid–gas phase change occurs. Melting point 494K. Gallium does not occur as a free element in nature, but as gallium(III) compounds in trace amounts in zinc ores and in bauxite. The chemical symbol for Erbium is Er. Elements are organised into blocks by the orbital type in which the outer electrons are found. Selenium is located at position 34 on the periodic table. Selenium is most commonly found in nature in its inorganic form, sodium selenite. Selenium (atomic number 32, symbol Se) is a nonmetal and a chemical element that is added to dietary supplements and is an essential mineral. The chemical symbol for Magnesium is Mg. Magnesium is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (group 2, or alkaline earth metals) of the periodic table: all group 2 elements have the same electron configuration in the outer electron shell and a similar crystal structure. From: Analytica Chimica Acta, 2013 Related terms: Bromine is the third-lightest halogen, and is a fuming red-brown liquid at room temperature that evaporates readily to form a similarly coloured gas. Plutonium is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. Diagram of the nuclear composition, electron configuration, chemical data, and valence orbitals of an atom of selenium-79 (atomic number: 34), an isotope of this element. Lutetium is the last element in the lanthanide series, and it is traditionally counted among the rare earths. Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. Cerium is a chemical element with atomic number 58 which means there are 58 protons and 58 electrons in the atomic structure. Its electronic configuration is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4 or it can be written as [Ar] 3d10 4s2 4p4. Lead is widely used as a gamma shield. The chemical symbol for Phosphorus is P. As an element, phosphorus exists in two major forms—white phosphorus and red phosphorus—but because it is highly reactive, phosphorus is never found as a free element on Earth. Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. The chemical symbol for Francium is Fr. The chemical symbol for Samarium is Sm. Selenium (34 Se) has six natural isotopes that occur in significant quantities, along with the trace isotope 79 Se, which occurs in minute quantities in uranium ores. It is located in Group 16 of the periodic table. 400 micrograms per day is set as the safe upper intake level in humans. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. Oxygen is a colourless, odourless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air. Melting point 494K. Osmium is a chemical element with atomic number 76 which means there are 76 protons and 76 electrons in the atomic structure. It has the atomic number 34 in the periodic table. 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. The percentage of an element produced in the top producing country. 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 chemical symbol for Thorium is Th. The five stable isotopes of selenium are Zirconium is a chemical element with atomic number 40 which means there are 40 protons and 40 electrons in the atomic structure. The percentage of the world reserves located in the country with the largest reserves. Commercial use of the Images will be charged at a rate based on the particular use, prices on application. The chemical symbol for Selenium is Se. Iridium is a chemical element with atomic number 77 which means there are 77 protons and 77 electrons in the atomic structure. Selenium Description. Francium is a highly radioactive metal that decays into astatine, radium, and radon. In a neutral atom there are as many electrons as protons moving about nucleus. Francium is the second-least electronegative element, behind only caesium, and is the second rarest naturally occurring element (after astatine). Antimony is a lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite. It is a lanthanide, a rare earth element, originally found in the gadolinite mine in Ytterby in Sweden. In excess it is carcinogenic and teratogenic (disturbs the development of an embryo or foetus). The chemical symbol for Aluminum is Al. The chemical symbol for Antimony is Sb. Download royalty-free .Selenium Atomic Number icon on white background stock photo 75128155 from Depositphotos collection of millions of premium high-resolution stock photos, vector images and … Selenium is a chemical element with the symbol Se and atomic number 34. 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.

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