Question

(a) Among halogen, the element that has highest ionization energy is
(1) F
(ii) CI
(iii) (I)​

Answer 1

Answer:

Halogen with highest ionization energy is F because it is having the small atomic radii due to the high effective nuclear charge and thus have high tendency to attract which is the reason it is difficult to take out an electron from the outermost shell of F. Hence have high ionization energy.