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88 Ra

Radium

Alkaline Earth Metal
Atomic Mass
226 u
Density
5.5 g/cm³
Melting Point
700 °C
Boiling Point
1,141 °C
State
Solid
Discovery
1898

Discovery

Discovered by Marie Curie and Pierre Curie in 1898.

Common Uses

  • Used in radiation therapy in the early 20th century.
  • Radium was historically used in luminous paint for watches and instruments.

Interesting Facts

  • Radium is highly radioactive and was once used in products like radium paint.
  • It glows faintly in the dark due to its radioactive decay.
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