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Variation of Atomic Size

Refer to chan...

Question

Refer to changes in properties of elements on moving left to right across a period of the periodic table.For each property , choose the letter corresponding to the correct answer from A,B,C and D.
Atomic Size :

A

decreases

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B

increases

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C

remains the same

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D

sometimes increases or decreases

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Solution

The correct option is A decreases
As we move from left to right, more electron fills in valence shell so attraction force between proton and electron increases.
And because of this attraction, atomic size decreases as we move from left to right.

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