Se

Selenium

Z 34 78.971 g/molOther Nonmetal

Overview Atomic Properties Thermodynamics Electromagnetism Isotopes

Group

16

Period

4

Block

p

Occurrence

Exploding massive starsGeochemical class: Chalcophile

Biological Role

Humans: MicronutrientMicrobes: Essential

History

1817 (discovery, isolation)

Jöns Jacob Berzelius, Johann Gottlieb Gahn

Named By

Jöns Jacob Berzelius

Latin Name

Selenium

Abundance

Solar System

x

Sun

x

Meteorites

x

Earth's crust

x

Oceans

x

Humans

x