It's all so unpleasant
Element of the day (day 19)
#34) Se-Selenium-] nonmetal solid
Necessary for full health in plants and animals.
Discovered in 1817 by Jons Jakob Berzelius, Sweden. Can covert light to electricity. Consequently, used in photoelectric cells, light meter, TV cameras, photocopiers, solar cells and semi-conductors. Selenium can convert a.c. electric current to d.c. current. Selenium can remove color from glass or it can add a red color to it. Used in alloys, especially with steel, and is the active ingredient in dandruff-prevention shampoos. Selenium minerals are quite rare.Most obtained as a by-product of electrolytic refining of copper, and occurs in the rare minerals clausthalite and crooksite.
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