Which of the following statements is incorrect?

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

R4R Team
R4Rin Top Tutorials are Core Java,Hibernate ,Spring,Sturts.The content on R4R.in website is done by expert team not only with the help of books but along with the strong professional knowledge in all context like coding,designing, marketing,etc!