The Electronic Configuration Of The Element With Maximum Electron Affinity Is

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Question

The electronic configuration of the element with maximum electron affinity is

easy

Solution

Correct option is

1s², 2s², 2p⁶, 3s², 3p⁵

Generally electron affinity increases in a period and decreases in a group but due to smaller size and high electron density on fluorine atom, it experience high inter electronic repulsions. Thus, F^– ion is less stable in comparison to Cl^– ion. Hence, electron affinity is highest for chlorine.

Its electronic configuration is

Cl(17) = 1s², 2s², 2p⁶, 3s², 3p⁵