ca sr ba mg a) most metallic? b) least metallic? c) lowest electronegativity? d) highest ionization energy? e) largest atomic radius? f) which are non-metals? g) list them in order from small to large. h) would they gain or lost electrons to form ions? what charge would the ion have? i) would the ion be larger or smaller than the atom? j) lowest shielding effect? k) would the ions be cations or anions? l) what is the special name given to the group to which these elements belong?