Question

Describe how the Curies first sighted Radium? What was its colour?

Answer 1

The Curies first discovered radium in September 1902. One night, before going to bed, they visited their laboratory to look at the bowls containing filtered pitchblende. In the dark room, they saw a soft bluish-purple glow coming from the glass-covered bowls. This was their first sight of radium.

The colour of radium was bluish purple.