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Name Selenium
Symbol Se
Atomic number 34
Atomic mass 79.0 amu
Classification Non-metal
Crystal structure Hexagonal
Color Gray
Date of discovery 1817
Name of discoverer Jons Berzelius
Name origin From the Greek word SelĂȘnĂȘ (Moon)
Uses Photoelectric cells, TV cameras
Obtained from Refining of lead, copper, nickel

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