Ionization Energies

Definition

Ionization energy is the minimum amount of energy required to remove an electron from a neutral atom in its gaseous state.

Related terms

First Ionization Energy:

This refers specifically to the amount of energy required to remove one electron from each atom in one mole of atoms, creating 1+ ions.

Second Ionization Energy:

This refers specifically to the amount of energy required to remove a second electron from each singly-charged positive ion in one mole of 1+ ions, creating 2+ ions.

Electronegativity:

It's a measure that reflects how strongly an atom can attract a pair of bonding electrons towards itself.