the energy required for the complete removal of 1 mol of electrons from 1 mole of gaseous atoms or ions is called energy. For a neutral element this energy is a measure of how easily the element forms an ion with a charge.

- Ionization energy is the energy required for the complete removal of 1 mol of electrons from 1 mol of gaseous atoms or ions.

c. 75.7

i think that is the right

you need to have a picture of the atom that way we can answer it