An element's atomic number is 63. how many protons would an atom of this element have?

Atomic number of an element correlates to the number of protons an atom of that element will have. An atom of this element would have 63 protons.

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.