What is ionisation energy?
the amount of energy needed to remove one electron from each atom, in a mole of atoms, in the gas phase.
There are 3 factors that affect the amount of ionisation energy needed to remove the outer electron. These are...
1) Electron shielding
- electron shielding is where electrons in the inner energy levels 'shield' the positive charge of the nucleus, so other electrons are not as strongly attracted to the nucleus.
- As the number of energy levels increases the nucleus is shielded more by electrons. So the strong nuclear attraction between the oppositely charged protons and electrons decreases.
- This means that, as the number…