Selenium is a photograph by Science Photo Library which was uploaded on October 4th, 2018.
Selenium
Selenium (Se). Diagram of the nuclear composition and electron configuration of an atom of selenium-80 (atomic number: 34), the most common isotope... more
Title
Selenium
Artist
Science Photo Library
Medium
Photograph
Description
Selenium (Se). 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 nucleus consists of 34 protons (red) and 46 neutrons (blue). 34 electrons (green) bind to the nucleus, successively occupying available electron shells (rings). The stability of an element's outer electrons determines its chemical and physical properties. A solid non-metal, selenium is in group 16, period 4, and the p-block of the periodic table. Used in early semiconductors, it is a trace mineral required in the diet. The two most common allotropes are a black form and a red form.
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October 4th, 2018
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