which of the following atoms with the specified electronic configuration would have the lowest first ionization energy? (a) (He)2s^2 2p^3 (b) (ne) 3s^2 3p^4 (c) [Xe]6s^1 (d) [Xe]6s^2 4f^14 5d^10 6p^1 (11) which of the following represents the change in electronic configuration that is associated with the first ionazition energy of magnesium (a) [Ne] 3s1 3p1---[Ne]3s1+e- (b) [Ne 3s2----[Ne]3s1 3p1 (c) [Ne]3s2---[Ne]3s1 +e- (d) [Ne]3s2+e-----[Ne]3s2 3p1