Question

Ionization energy is the amount of energy necessary to _____. to fill the outer energy level with electrons remove an electron from an atom form an anion form an ionic bond

Answer 1

remove an electron from an atom

Step-by-step explanation:

Answer 2

Ionization energy is the amount of energy necessary to remove an electron from an atom.

If the atom was neutral to begin with, then removing an electron makes it ionized.