5.7 Orbitals of similar energies can be e seven rows grouped into snells correspond to the seven periods in the e periodic table. 45-4p---4d The maximum number 3-3p---3d of electrons each row 2s-2n can hold is equal to the number of elements in the corresponding perio (2,8,8,18,18,32,32)5.7 Orbitals of similar energies can be grouped into shells The seven rows correspond to the seven periods in the periodic table. The maximum number of electrons each row can hold is equal to the number of elements in the corresponding period. (2, 8, 8, 18, 18, 32, 32)