Question

what is ionisation enthalpy?​

Answer 1

Answer:

the energy required to remove the outermost electron from the valence shell at ground state of a gaseous element.

Mark me if it helps

Answer 2

In physics and chemistry, ionization energy or ionisation energy is the minimum amount of energy required to remove the most loosely bound electron of an isolated neutral gaseous atom or molecule.

Explanation:

Mark me as brainliest.