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Standard X
Chemistry
Atomic Radius
Assertion :Th...
Question

Assertion :The atomic radii of the elements of oxygen family are smaller than the atomic radii of corresponding elements of the nitrogen family. Reason: The members of oxygen family are all more electronegative and thus have lower value of nuclear charge than those of the nitrogen family.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Assertion is incorrect but Reason is correct
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Solution

The correct option is C Assertion is correct but Reason is incorrect
Assertion is correct but Reason is incorrect.
The atomic radii of the elements of oxygen family are smaller than the atomic radii of corresponding elements of the nitrogen family.
In moving from group 15 to group 16 in a period, the effective nuclear charge increases. The electrons of group 16 elements experience a greater nuclear pull. This decreases atomic radius.

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