Question

what is electron affinity pls answer fast its urgent fast plsss​

Answer 1

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The energy required to gain an electron to an atom. are called electron affinity.

Answer 2

Definition of electron affinity

Electron affinity is the affinity of an element to an electron. This is measured by the energy released when an element in its gaseous state accepts an electron to form an anion. So this is an exothermic reaction. They are expressed in KJ mol-1.

M(g) + e– → M–(g)       EA

Since one, two or more electrons can be added to form an anion, many types of electron affinity is possible.

The first electron affinity (EA1) is the energy released when first electron is added to an element in gaseous state.

The second electron affinity (EA2) is the energy released when second electron is added to the negatively charged (M–) element in its gaseous state.

The successive electron affinity are also possible for the negatively charged element in its gaseous state.

M(g) + e– → M–(g)     EA1

M–(g) + e– → M2-(g)    EA2

M2-(g) + e– → M3–(g)    EA3