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Which of the following statement(s) is(a...

Which of the following statement(s) is(are) correct?

A

vander Waals radius of iodine is more than its covalent radius

B

All isoelectronic ions belong to the same period of the periodic table

C

`IE_1` of N is higher than that of O while `IE_2` of O is higher than that of N

D

The electron gain enthalpy of N is positive while that of P is negative.

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The correct Answer is:
A, C, D
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