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Name Thorium
Symbol Th
Atomic number 90
Atomic mass 232.03806 amu
Normal state Solid
Classification Metallic
Crystal structure Cubic face centered
Color soft, ductile silvery metal
Date of discovery 1829
Name of discoverer WJöns Berzelius
Name origin Named after Thor, the Norse god of war.
Uses Used in the manufacture of strong alloys and ultraviolet photoelectric cells. Can be bombarded with neutrons to make uranium-233, a nuclear fuel.
Obtained from Found in various minerals like monazite and thorite and dispersed on pegmatite rocks.