Radium was discovered in 1898 by the Polish chemist Marie Sklodowska Curie, and a French chemist named Pierre Curie. Radium was discovered in an uranite sample after the uranium was removed, resulting in only radium remaining.
The chemical symbol for radium is Ra, with an atomic number of 88. It belongs to the alkaline earth metal group of the periodic table. In its purest form, radium is a silver color. Once oxygen touches radium turns black. Radium is dangerously radioactive, therefore there are currently no commercial uses for the element. The name radium derives from the Latin word radius, meaning "ray."