Question

Definition of ionization potential excitatinal potential

Answer 1

I know for Ionization potential.

It is the amount of energy required to remove an electron from its valence shell of an isolated gaseous atom.

Answer 2

Ionisation potential is the amount of energy required to remove a loosely bound electron from the outermost shell of an isolated gaseous atom to form a cation ...

but I don't know about Excitational potential ...