Wikipedia: Radium

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Its appearance is almost pure white, but it blackens with exposure to air. Discovered by Marie Curie in 1898, Radium is over 1 million time more radiocative than the same amount of Uranium.

Its appearance is almost pure white, but it blackens with exposure to air. Discovered by Marie Curie in 1898, Radium is over 1 million times more radioactive than the same amount of Uranium.

A chemical element, in the periodic table radium has the symbol Ra and atomic number 88.

Its appearance is almost pure white, but it blackens with exposure to air. Discovered by Marie Curie in 1898, Radium is over 1 million times more radioactive than the same amount of Uranium.

See: Periodic table