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**.In this way, how many electrons can be placed in the 2s sublevel?

The s sublevel has just one orbital, so can contain 2 electrons max. The p sublevel has 3 orbitals, so can contain

**6 electrons**max. The d sublevel has 5 orbitals, so can contain**10 electrons**max. And the 4 sublevel has 7 orbitals, so can contain**14 electrons**max.How many electrons are allowed in each shell?

Each shell can contain only a fixed number of electrons: The first shell can hold up to

**two electrons**, the second shell can hold up to eight (2 +**6**) electrons, the third shell can hold up to**18**(2 + 6 + 10) and so on. The general formula is that the nth shell can in principle hold up to 2(n^{2}) electrons.How many electrons can exist in an orbital?

This tells us that each subshell has double the electrons per orbital. The s subshell has 1 orbital that can hold up to

**2 electrons**, the p subshell has 3 orbitals that can hold up to 6 electrons, the d subshell has 5 orbitals that hold up to 10 electrons, and the f subshell has 7 orbitals with 14 electrons.