Transition and InnerTransition Elements - Result Question 78
####4. The highest possible oxidation states of uranium and plutonium, respectively, are
(2019 Main, 10 April II)
(a) 7 and 6
(b) 6 and 7
(c) 6 and 4
(d) 4 and 6
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Solution:
- Actinoids show a variety of oxidation states due to comparable energies of $5 f, 6 d$ and $7 s$ energy levels.
In the actinoids family (5f-block), uranium (U) neptunium $(Np)$, plutonium $(Pu)$ and americium $(Am)$ have highest possible oxidation states of $+6,+7,+7$ and +6 respectively.
