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Second electron affinity of an element...

Second electron affinity of an element

A

is always negative

B

is always positive

C

can be positive or negative

D

is always zero

Text Solution

Verified by Experts

The correct Answer is:
B
`O_((g)) +e^(-) underset(-EA_(1))to O_((g))^(Ɵ)+e^(-) underset(-EA_(2))to O_((g))^(2-)`
Energy is required to add an electron to the negatively charge species due to electron-electron repulsion.
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