Which of the following statements is/are wrong?

Options

A. van der Waals’ radius of iodine is more than its covalent radius
B. All isoelectronic ions belong to 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 affinity of N is almost zero while that of P is 74.3 kJ `"mol"^(–1)`

Answer

B

Explanation

In the isoelectronic species, all isoelectronic anions belong to the same period and cations to the next period.