Arrange the elements Ne, P and K in order of increasing first ionization energy .

Question

Quizplus · Accepted Answer

The first ionization energy increases as we move from left to right in the periodic table and decreases as we move down a group. 
Therefore, K with a valence electron in the fourth energy level and P with a valence electron in the third energy level have lower first ionization energies compared to Ne with a full valence shell in the second energy level. 
Thus, the order of increasing first ionization energy is K < P < Ne.

Arrange the Elements Ne, P and K in Order of Increasing