Ionization energy in English and explain

The first ionization energy (IE₁) is the energy needed to remove the outermost electron from a neutral atom. The second ionization energy (IE₂) is the energy needed to remove an electron from a +1 ion, and so on. Generally, successive ionization energies increase (IE₂ > IE₁ > IE₃...) because it becomes progressively harder to remove an electron as more positive charge builds up on the atom.