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Standard XII

Chemistry

Electron Gain Enthalpy

Atomic radii ...

Question

Atomic radii of 3 non-metals $A, B, C$ belonging to the same group are $A < B < C$ . Predict the order of electron affinity values.

A > B > C

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A < B < C

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A < B > C

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A > B < C

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Solution

The correct option is A $A > B > C$
Electron affinity is the ability of an atom to accept an electron. Electron affinity generally decreases down a group of elements because each atom is larger than the atom above it. This means that an added electron is further away from the atom's nucleus compared with its position in the smaller atom.

Hence the order is $A > B > C$ .

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Similar questions

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Element	Atomic number	No. of electrons in the valence shell	Group to which the element belongs
A B C	Z − 1 Z Z + 1	.... .... ....	.... .... ....

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Atomic radii of 3 non-metals A,B,C belonging to the same group are A<B<C. Predict the order of electron affinity values.

Atomic radii of 3 non-metals $A, B, C$ belonging to the same group are $A < B < C$ . Predict the order of electron affinity values.