Question

What is ionisation energy?
plz answer fast guys​

Answer 1

Hello Mate,

Ionization energy is the energy required to remove an electron from a gaseous atom or ion. The first or initial ionization energy or Ei of an atom or molecule is the energy required to remove one mole of electrons from one mole of isolated gaseous atoms or ions.

Hope this helps you

Answer 2

The ionization energy of an element is the minimum energy required to remove an electron from its gaseous atom to form an ion.