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Ur- Uraninite
- Naturally occuring Uranium Oxide.
- Uranium
- Although uranium is the longest known member of the actinide group of metals, it attracted scant attention until the discovery of uranium fission in 1939.
- Uranium Oxide
UO2 Greyish-black brittle and heavy mineral. - Uranus
- The seventh planet from the sun in our solar system.
- Urea
- Common name for Carboxamide.
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