Question

Why does the ionization energy decrease as you move down a group on the periodic table?

More neutrons in the nucleus


More electrons in the outer energy level


The size of the atom increases

Answer 1

1) As you move down a group, first ionization energy decreases. WHY? Electrons are further from the nucleus and thus easier to remove the outermost one. 2) As you move across a period, first ionization energy increases.

so i think it is b

Step-by-step explanation: