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Identify the least stable among the foll...

Identify the least stable among the following

A

`Li^(-)`

B

`Be^(-)`

C

`B^(-)`

D

`C^(-)`

Text Solution

Verified by Experts

The correct Answer is:
B
`Be(1s^(2)2s^(2))` due to its fully filled 2s-subshell has least tendency to take up an electron . As such `Be^(-)` is least stable.
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