Question

what is ionisation potential ?

Answer 1

Ionisation energy or ionisation potential is defined as the energy required to remove an electron from the outer most orbit or shell. It's value depends on various factors like size, distance from nucleus etc.

Answer 2

Answer:

• ionization enthalpy of an element is defined as  the amount of energy required to remove "the most loosely" electron from the outermostmost shell of it's isolated gaseous atom in the ground statelogens(Cl,F,Br etc.) and least for metals especially alkali metals (lithium,sodium,potassium etc..)