b) S2,Cl,Ar,K+. What special term can you use to describe these species? c) Ca,Ca+,Ca2+ 5. Identify the subshells with the following combinations of quantum numbers and arrange them in order of increasing energy in an atom of gold: a) n=2,1=1 b) n=5,1=0 c) n=3,l=2 d) n=4,1=3