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Which of the following actinoids is well...

Which of the following actinoids is well known to exhibit `+2` oxidation state ?

A

Ce

B

No

C

Lr

D

both (2) and (3)

Text Solution

Verified by Experts

The correct Answer is:
B
The `(+3)` oxidation state is the most stable for all the actinoids but one of the elements with atomic number 96 - 103. The exception is No, which is most stable as No `(+2)`. This is stable because it has a favourable `f^(14)` electronic configuration. Lr exists only in the `(+3)` state and resists both oxidation as well reduction, again illustrating the stability of an `f^(14)` electronic arrangement. Ce is a lanthanoid which is well known to exhibit `+4` oxidation state.
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