Discovery of Radium
shared by ram.shengale.7 on Feb 25
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Radium is a radioactive element with the chemical symbol 'Ra'. It emits radioactive light rays which cause it to glow in the dark. In regular conditions, radium is a silvery metal. When exposed to air...
, it reacts to nitrogen and quickly forms a black coating.
Source
https://moco...of-radium/Category
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