Question

What is ionisation energy

Answer 1

The ionization energy orionization potential is the energy necessary to remove an electron from the neutral atom. It is a minimum for the alkali metals which have a single electron outside a closed shell. It generally increases across a row on the periodic maximum for the noble gases which have closed shells.

Answer 2

Ionization energy is the energy needed to take an electron from an atom. The atom is not connected to any other atoms. The chemical elements to the left of the periodic table have a much lowerionization energy.