True or false. elements in the same period have the same number of valence electrons

False. elements in the same period have the same number of shells while elements in the same group have the same number of valence electrons.

There is one s orbital, and there are three p orbitals, five d orbitals, and seven f orbitals. thus, the answer is b. do not confuse the number of orbitals in a subshell with the number of electrons the subshell can hold. each orbital can hold two electrons, so the capacity of an nf subshell is 14 electrons.