The atomic number of the element next to 16S in the same group is

The electronic configuration of S is (1s)2(2s)2(2p)6(3s)2(3p)4.So the next element in this group will have configuration (1s)2(2s)2(2p)6(3s)2(3p)6(3d)10(4s)2(4p)4 that is, its atomic number is 34.