Radium
Legal definition for Indian law research
Definition
An intensely radioactive metallic element found combined in minute quantities in pitchblende and various other uranium minerals Symbol Ra atomic weight 2264 Radium was discovered by M and Mme Curie of Paris who in 1902 separated compounds of it by a tedious process from pitchblende Its compounds color flames carmine and give a characteristic spectrum It is divalent resembling barium chemically The main isotope of radium found in pitchblende radium 226 has a half life of 1620 years decaying first by alpha emission to radon
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