Electron affinity is positive, when

Question

Electron affinity is positive, when (A) O changes into O- (B) O- changes into O2- (C) O changes into O+ (D) electron affinity is always negative

Tardigrade Admin · Accepted Answer

When O -, changes into O 2-, change is endothermic because O -repels the incoming electron due to similar charge, hence it needs energy to accept the electron. So, electron affinity is positive.

Q. Electron affinity is positive, when

$O$ changes into $O^{-}$

$O^{-}$ changes into $O^{2 -}$

$O$ changes into $O^{+}$

electron affinity is always negative

When $O^{-}$ , changes into $O^{2 -}$ , change is endothermic because $O^{-}$ repels the incoming electron due to similar charge, hence it needs energy to accept the electron. So, electron affinity is positive.

Q. Electron affinity is positive, when

O changes into O−

O− changes into O2−

O changes into O+

electron affinity is always negative

When O−, changes into O2−, change is endothermic because O−repels the incoming electron due to similar charge, hence it needs energy to accept the electron. So, electron affinity is positive.

$O$ changes into $O^{-}$

$O^{-}$ changes into $O^{2 -}$

$O$ changes into $O^{+}$

When $O^{-}$ , changes into $O^{2 -}$ , change is endothermic because $O^{-}$ repels the incoming electron due to similar charge, hence it needs energy to accept the electron. So, electron affinity is positive.