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Selenium



Name Selenium
Atomic Number 34
Atomic Weight 78.96
Symbol Se
Melting Point ( °C ) 493.65 K (220.5°C or 428.9°F)
Boiling Point ( °C ) 958 K (685°C or 1265°F)
Density (g/cm3) 4.809 grams per cubic centimeter
Earth crust (%) 5×10-6%
Discovery (Year) 1817
Group nonmetal
Electron configuration [Ar] 3d10 4s2 4p4
Ionization energy (eV) 9,7524

Selenium Selenium is an element on the periodic table with the atomic number of 34. Selenium is used on things like photoelectric cells and TV cameras. Selenium can be obtain from refining lead, copper, and or nickel. This element was named after the greek word for moon. Selenium has a hexagonal crystal structure.

References

http://www.chemicalelements.com/elements/se.html

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