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Energy is released when an electron is a...

Energy is released when an electron is added to neutral isolated gaseous atom in its ground state to give monoanion and this is known as `EA`, or `Delta_(eg)H_(1)^(ɵ)`. The greater the amount of energy released the greater is the `EA`. `EA` is expressed in `eV a"atom"^(-1)` or `kcal or K\kJ mol^(-1)`.
Select the correct statements (more than one correct)

A

`EA` and `Delta_(eg)H_(1)^(ɵ)` of an atom of element have same magnitude

B

`Delta_(eg)H_(1)^(ɵ)` of `Al gt B`

C

`Delta_(eg)H_(1)^(ɵ)`of `P gt N`

D

`Delta_(eg)H_(1)^(ɵ)` of `S gt O`

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The correct Answer is:
A, B, C, D
In (b), ( c) and (d), all are exceptional cases.
This is due to the small sizes of `B,N` and `O` in comparison to the sizes of `Al, P` and `S` respectively, similar to exceptional case of `Cl` and `F(Delta_(eg)H^(ɵ)` "of" `Cl gt F`).
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