How does the magnitude of effective nuclear charge influence the electron affinity of an element?

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Solution

Electron affinity - The electron affinity is the amount of energy released when an electron is added to an isolated gaseous atom in its lowest-energy state to produce an anion.
The attractive force by which a positively charged nucleus attracts the electron towards itself is known as a nuclear charge.
Due to screening, the electrons of the valence shell and the penultimate shell repel each other.
Due to which the net nuclear charge experienced by the electron decreases. This net nuclear charge experienced by the electrons is known as an Effective nuclear charge.
The greater the effective nuclear charge, the higher is the electron affinity of an atom.

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