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Trend in Atomic Radius

The correct o...

Question

The correct order of atomic radii among the following elements is:

A

S < C l < A r

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B

A r < S < C l

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C

C l < S < A r

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D

A r < C l < S

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Solution

The correct option is C $C l < S < A r$
As we move from left to right, atomic radii decreases due to increse in effective nuclear charge $(Z_{e f f})$ .
Noble gases have highest size in the period because they have their vander-wall radii, which is always greater than covalent radii.
Therefore, correct order of radii is: $C l < S < A r$

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