Ahelium atom has protons & neutrons ?

1 proton

(found in periodic table)

(atomic mass - atomic number = neutrons
1 - 1 = 0)

0 neutrons

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.