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Which of the following pairs show reverse properties on moving along a period from left to right and from top to down
in a group ?

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An Intiative by Sri Chaitanya

Nuclear charge and electron affinity

Ionisation energy and electron affinity

Atomic radius and electron affinity

None of these

answer is C.

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Detailed Solution

Atomic radius increase from top to bottom in a group while decrease from left to right in a period. On the other hand, electron affinity shows revere trends i.e. decrease from top to bottom in a group and increase from left to right in a period.

$E . A \propto \frac{1}{Atomic size}$

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