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Which of the following exhibits only +3 ...

Which of the following exhibits only +3 oxidation state?

A

Pa

B

U

C

Th

D

Ac

Text Solution

Verified by Experts

The correct Answer is:
D
Element actium (Ac), with the configuration, `[Xe]6d^(1)7s^(2)` exhibits only `+3` oxidation state. The most stable oxidation states for the other elements are Th `(+4)`, Pa `(+5)` and U `(+6)`.
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