Question

For which element would you expect a large jump between the first and second ionization energies?

Answer 1

a. F
b. Ca
c. Fe
d. Na

Answer 2

Fluorine takes the greatest first ionization energy of all.
But sodium get the greatest jump from first to second ionization with over 4000 kj/mol gap.
In the case of Fl its almost 1700 kj/mol.

Answer 3

an element with a valency of 1