Question

.Which of the following statements is incorrect?



(1)I.E.1 of O is lower than that of N but I.E.2 O is higher than that of N

(2)The enthalpy of N to gain an electron is almost zero but of P is 74.3 kJ mol-1

(3)isoelectronic ions belong to the same period

(4)The covalent radius of iodine is less than its Van der Waal’s radius

don't write silly answers..
​

Answer 1

Answer:

3 I think it is write or not

Answer 2

Answer:

Isoelectronic ions belong to the same period.

Explanation:

It is not certain that Isoelectronic ions belong to the same period. They may belong to different periods also.