Question

Part A What is the third-row element having the successive ionization energies in kJ/mol: 738, 1451, 7733, 10,540, 13,630, 17,995, 21,703 Express your answer as a chemical symbol Submit Previous Answers Request Answer X Incorrect: Try Again; 3 attempts remaining Provide Feedback Next>

Answer 1

Since the given succesive ionisation energy values are 738, 1451, 7753,10540,13630,17630,17995 and 21703

from the above value there is a sudden increase from second ionisation energy to third ionisation energy i.e., from 1451 to 7753 value

hence after removing two electrons from the valence shell of the element it will get stabl configuration so the valence shell.

so the element may be Mg : 1s2 2s2 2p6 3s2

so after removing 2 electrons from Mg it will get stable configuration as 1s2 2s2 2p6 3s0

hence the electron removed from this stable configuration requires more amount of energy hence the ionisation energy became very large value.