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Abundance In Universe
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- Promethium metal found in Pitchblende.
- Promethium metal is highly radioactive metal.
Found in Minerals, Mining
Chien Shiung Wu, Emilio Segrè, Hans Bethe
- Chromium is highly reactive, hence it is not found free in nature.
- Ores of Chromites mineral are the major source of Chromium metal.
- Almost 90% leather tanning is done with the help of chromium.
Found in Minerals, Mining, Ores of metals, Ores of Minerals