Edexcel IAL Chemistry 3.7 Trends in ionic radii

An explanation that makes reference to the following points: - (ionic) radius decreases (with (increasing) atomic (1) number) - because there are more protons (in the nucleus) (1) - and the ions are isoelectronic (1) Must be a trend not a comparison for M1 Ignore "across the period" Do not award atomic radius Allow nuclear charge increases Ignore mass to charge ratio Ignore atomic number Ignore electrostatic force between electrons and nucleus is increasing (if no mention of protons) Accept there is no variation in shell/shielding / all have 10 electrons / the same number of electrons / same electronic configuration Ignore references to group