Why does shielding effect of inner electrons , influence ionisation energy (5)

- Electrons are negatively charged, so they repel each other - Electrons in full inner shells repel electrons in outershells - Full inner shells of electrons prevent outer electrons prevent outer electrons from feeling full nuclear charge, this is called shielding - Greater the shielding of outer electrons by the inner electrons shells, the lower the attractive force between the nucleus and the outer electrons. - Ionisation energy is lower as the number of full electron shells between outer electrons and nucleus increases