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Question

The electron affinity of an atom is numerically equal to the:
ionization potential of its uninegative ion
effective nuclear charge of its unipositive ion
ionization potential of its dinegative ion
ionization potential of it unipositive ion

A

ionization potential of its uninegative ion

B

ionization potential of it unipositive ion

C

ionization potential of its dinegative ion

D

effective nuclear charge of its unipositive ion

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Solution

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The electron affinity of an atom is numerically equal to the ionization potential of uninegative ion.

$X^{-} - e^{-} \to X$ $⟹$ Ionization potential of atom's uninegative ion

$X + e^{-} \to X^{-}$ $⟹$ Electron affinity of the atom

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