Selenium
Atomic No:
34
Name:
Selenium  [si'li:niɪm]
Formula:
Se
Molar Mass:
78.96

Selenium element has 34 protons, 45 neutrons and 34 electrons. Selenium is a solid metal at room temperature, melting point 221 ̊C.

» Common Selenium compounds:
• Selenium(IV) Oxide, SeO2
• Selenium Dibromide, SeBr2
• Ammonium Selenide, (NH4)2Se
• Iron(III) Selenide, Fe2Se3
• Hydrogen Selenide, H2Se
• Selenium Trioxide, SeO3
• Tin(IV) Selenate, Sn(SeO4)2
• Selenic Acid, H2SeO4
• Selenious Acid, H2SeO3
• Copper(II) Selenite Dihydrate, CuSeO3.2H2O
• Potassium Selenite, K2SeO3


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