Question

Electron affinity decreases on moving down the group but increases on moving across the period. give reason​

Answer 1

Answer:

Electron affinity decreases down the groups and from right to left across the periods on the periodic table because the electrons are placed in a higher energy level far from the nucleus, thus a decrease from its pull. ... The increased nuclear charge as you go down the group is offset by extra screening electrons.

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Explanation:

Answer 2

Answer:

Electron affinity decreases down the groups and from right to left across the periods on the periodic table because the electrons are placed in a higher energy level far from the nucleus, thus a decrease from its pull. ... The increased nuclear charge as you go down the group is offset by extra screening electrons.

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