Selenium is a chemical element; it has the symbol Se and atomic number 34. It has various physical appearances, including a brick-red powder, a vitreous black solid, and a grey metallic-looking form.

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Selenium is a chemical element with symbol Se and atomic number 34. Classified as a nonmetal, Selenium is a solid at room temperature. [Ar]4s 2 3d 10 4p 4. J.C. Slater, J Chem Phys, 1964, 41 (10), 3199-3205. DOI:10.1063/1.1725697.

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Selenium is a chemical element of the periodic table with chemical symbol Se and atomic number 34 with an atomic weight of 78.9718 u and is classed as nonmetal and is part of group 16 (oxygen group).

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Selenium is the 34th element in the periodic table and has a symbol of Se and atomic number of 34. It has an atomic weight of 78.971 and a mass number of 80. Selenium has thirty-four protons and forty-six neutrons in its nucleus, and thirty-four electrons in four shells. It is located in group sixteen, period four and block p of the periodic table.

Element Selenium (Se), Group 16, Atomic Number 34, p-block, Mass 78.971. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.

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