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EN of the element (A) is E(1) and EA is ...

EN of the element (A) is `E_(1)` and EA is `E_(2)` hence IP will be :

A

`2e_(1)-E_(2)`

B

`E_(1)-E_(2)`

C

`E_(1)-2E_(2)`

D

`(E_(1)+E_(2))//2`

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A
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