Question

what is electron affinity?​

Answer 1

Answer:

The electron affinity of an atom or molecule is defined as the amount of energy released when an electron is attached to a neutral atom or molecule in the gaseous state to form a negative ion

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Answer 2

Electron affinity is defined as the amount of energy released when an electron is added to a neutral atom to form an anion.

The electron affinity is the potential energy change of the atom when an electron is added to a neutral gaseous atom to form a negative ion. So the more negative the electron affinity the more favorable the electron addition process is. Not all elements form stable negative ions in which case the electron affinity is zero or even positive.

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