Predict the relative atomic radii of the three magnesium isotopes, giving your reasons?

the atomic radii will be the same for all

All isotopes have the same number of protones , same number number of electrons , and hence since the atomic radii is a chemical property that is related to the of an element , the atomic radii will be the same for all isotopes. Also, all isotopes have the same , same number of orbitsls , same number of occupied energy levels,,, Remember that chemical properties of isotopes of an element are the same as they all have the same electron configuration.