Selenium

Name:
Selenium  [si'li:niɪm]
Formula:
Se
Molar Mass:
78.96

Se Molar Mass Converter
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Se Molar Mass Conversion in Batch

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Elem.
Total
Name
Atomic Mass
(g/mol)
Percentage
Mass
Se
1
Selenium
78.96
100%
78.96
→ Se
Total: 78.96 (g/mol)


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

Example Reactions:
• Sr + Se = SrSe
• H2SeO3 + 2SO2 + H2O = Se + 2H2SO4
• 3H2O + 2SeCl2 = H2SeO3 + Se + 4HCl
• 2K + Se = K2Se
• Se + 2F2 = SeF4
• Ba + Se = BaSe
• Se + Mg = MgSe
• 2Ag + Se = Ag2Se
• SeO2 + 2H2O + 2SO2 = Se + 2H2SO4
• 2Na + Se = Na2Se
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