Discovered in 1828 by Swedish scientist Jöns Jacob Berzelius, thorium is a slightly radioactive metal which covers much of the moon. It is an alternative yet to be used other than it’s more expensive counterpart, uranium.
Discoverer(s): Jöns Jacob Berzelius, Has Morten Thrane Esmark
Country(s) Discovered: Sweden
Atomic Number: 90
Melting Point(C): 1750
Atomic Mass: 232.03806
Radioactive? Decay?: Yes, becomes Uranium-233
Normal State: Solid
Metal, nonmetal, metalloid?: Metal
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