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90 Th

Thorium

Actinides
Atomic Mass
232.03806 u
Density
11.7 g/cm³
Melting Point
1,750°C
Boiling Point
4,790°C
State
Solid
Discovery
1828

Discovery

Discovered by Jöns Jacob Berzelius in 1828.

Common Uses

  • Nuclear fuel in reactors
  • Manufacture of high-quality lenses
  • Alloying element in magnesium

Interesting Facts

  • Thorium is more abundant in Earth's crust than uranium.
  • It has potential as a safer alternative to uranium in nuclear reactors.
  • Thorium dioxide has the highest melting point of any oxide.
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