34
Se
78.9718Selenium
Appearanceblack, red, and gray (not pictured) allotropes
Categorypolyatomic nonmetal
Discovered byJöns Jakob Berzelius
Named byN/A
What element is Se on the periodic table?Se is the element Selenium on the periodic table.
What is the symbol for Selenium on the periodic table?The symbol for Selenium on the periodic table is Se.
What does Selenium look like?To the human eye, Selenium is black, red, and gray (not pictured) allotropes.
About SeleniumSelenium 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.Source: Wikipedia