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214 bytes added, 04:45, 1 April 2013
{{Element | name=Thorium | symbol=Th | anumber=90 | amass=232.03806 amu | state=Solid | class=Metallic | cstructure=Cubic face centered| color=soft, ductile silvery metal | date=1829 | discname=WJöns Berzelius | origname=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=Found in various minerals like [[monazite]] and [[thorite]] and dispersed on pegmatite rocks. }}
Thorium is a radioactive, naturally occurring chemical element. The symbol for Thorium is '''Th''' and it has an atomic number of 90. It was discovered by Morten Thrane Esmark and identified by Jons Jakob Berzelius in 1828. It is named after Thor, the Norse god of war. Thorium is a viable alternative to Uranium as a fuel for nuclear reactors. The amount of long life radioactive material produced in the thorium reaction is significantly smaller than that of the uranium reaction.
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