The highest possible oxidation states of uranium and plutonium, respectively are :
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- 4 and 6
- 6 and 4
- 7 and 6
- 6 and 7
The Correct Option is D
Solution and Explanation
Uranium (5f36d17s2) uses all six valence electrons: highest oxidation state = +6 (UF6, UO22+).
Plutonium (5f67s2) shows oxidation states +3 to +7; its highest is +7 (e.g. in strongly alkaline medium).
Hence uranium and plutonium: 6 and 7.
Answer: (4) 6 and 7
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