Question

What is ionisation energy? What are the factors that effect ionisation energy?​

Answer 1

Answer:

Basically there are five factors which can affect the Ionization energy like size of an atom,The effective nuclear charge,Shielding effect,Penetration effect and electronic configuration of an atom. All these factors related to the number of electrones in the valence shell and between the valence shell and nucleus.

Answer 2

Explanation:

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.

Nuclear charge and shielding (screening) effect affects ionisation energy. The greater the number of protons, the stronger the nuclear charge. This results in greater attraction for the valence electrons and more energy required to remove them, i.e. higher ionisation energy.