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CD School House 9.0 - Wayzata Technology (1994).iso
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thorium.asc
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1992-10-03
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428b
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15 lines
THORIUM
Atomic symbol - Th
Atomic weight - 232.0381
Atomic number - 90
Electron configuration - 2-8-18-32-18-10-2
Oxidation states - +4
State of matter - solid
Heavy metal-ductile
Discovered in 1828 by Jöns Jacob Berzelius
Boils at about 4000 °C, melts at about 1700 °C
Notes:
Thorium is a radioactive element. It is silvery white but when exposed to air
turns gray or black.