Selenium - Element information, properties and uses | Periodic Table
网页Element Selenium (Se), Group 16, Atomic Number 34, p-block, Mass 78.971. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. Jump to main content
Selenium - Wikipedia
网页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. It seldom occurs in this elemental …
Selenium (Se) - Periodic Table
网页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.
Selenium | Uses in Electronics, Health Benefits & Environmental …
网页2024年9月8日 · selenium (Se), a chemical element in the oxygen group (Group 16 [VIa] of the periodic table), closely allied in chemical and physical properties with the elements sulfur and tellurium. Selenium is rare, composing approximately 90 parts …
Periodic Table - Ptable
网页Interactive periodic table showing names, electrons, and oxidation states. Visualize trends, 3D orbitals, isotopes, and mix compounds. Fully descriptive writeups.
Selenium Facts – Element Se or 34 - Science Notes and Projects
网页2023年11月25日 · Selenium is a chemical element with the symbol Se and atomic number 34. It is a nonmetal with properties that are intermediate between the elements above and below on the periodic table, sulfur and tellurium. People most often encounter selenium as a nutritional supplement or in dandruff shampoo.
Selenium (Se) - Periodic Table
网页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). Selenium is solid at room temperature.
Selenium Facts - Periodic Table of the Elements - ThoughtCo
网页2021年9月2日 · Selenium Basic Facts. Atomic Number: 34. Symbol: Se. Atomic Weight: 78.96. Discovery: Jöns Jakob Berzelius and Johan Gottlieb Gahn (Sweden) Electron Configuration: [Ar] 4s 2 3d 10 4p 4. Word Origin: Greek Selene: moon.
Selenium - Periodic Table
网页Selenium - Properties, history, name origin, facts, applications, isotopes, electronic configuation, crystal structure, hazards and more; Interactive periodic table of the chemical elements.
Element: Selenium - Periodic table
网页Selenium is a chemical element with the symbol Se and atomic number 34. It is a metalloid (more rarely considered a nonmetal) with properties that are intermediate between the elements above and below in the periodic table, sulfur …