1. Determine the smallest atom in group 7A and arrange the given atoms in order of growing atomic radius: Na, Al, P, Cl, Mg.
2. Arrange the given order of increasing first ionization energy: F, K, P, Ca, and Ne.
3. Discuss which of the given elements you would expect to have greatest electron similarity: He, K, Co, S, Cl.
4. Discuss why the alkali metals have greater affinity for electrons comparison the alkaline earth metals.