QJEEM22Ch5308: JEE Main 2022 Chemistry - Class 11 JEEM22Ch5308 Solution: The first ionization enthalpies of Be, B, N and O follow the…

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The first ionization enthalpies of Be, B, N and O follow the order

Accepted Answer

The first ionization energy increase from left to right along

2^{\text {nd }}

period with the following exceptions

{IE}_{1} : Be > B

and

N > O

This is due to stable configuration of

Be

in comparison to

B

and that of

N

in comparison to

O

.

Hence the correct order is

N > O > Be > B

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