Question

Which elements belong to the same group?
N, P, As,Sb
Ne, F, Ar,Kr
Rb, Sr, Y, Zr
K, Ca, Mg, Be

Answer 1

(N,P) (As,Sb)
(Ne,Ar, Kr) (F)
Basically look up groups on the periodic table and then sort the elements the ones that are in the same group.