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

1.	Which of the following statement(s) is(are) correct?
Answer» vander Waals radius of iodine is more than its covalent radius All isoelectronic ions belong to the same PERIOD of the periodic table `IE_1` of N is higher than that of O while `IE_2` of O is higher than that of N The electron gain enthalpy of N is positive while that of P is negative. Answer :A::C::D

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