cid aaca3ad43b887f59761258e3710a4e0e8811d76c946421bfd4ee020418504c09 · original · open access · via wikipedia
Title: Selenium Authors: Venue: Wikipedia Year: unknown Canonical: wiki:selenium URL: https://en.wikipedia.org/wiki/Selenium Collector: wikipedia OA: true ABSTRACT Selenium is a chemical element; it has 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 state or as pure ore compounds in Earth's crust. Selenium was discovered in 1817 by Jöns Jacob Berzelius, who noted the similarity of the new element to the previously discovered tellurium.