How many electrons occupy P orbitals in a chlorine atom?
Your tool of choice here will be chlorine's electron configuration.
Chlorine's electron configuration looks like this
#"Cl: " 1s^2 2s^2 2p^color(red)(6) 3s^2 3p^color(green)(5)#
Now, notice that the first energy level doesn't not contain a p-subshell, and implicitly any p-orbitals.
The second energy level, on the other hand, contains two subshells, the 2s-subshell, which contains
Finally, the third energy level contains two occupied subshells, the 3s-subshell, which once again contains
Therefore, the number of electrons you get in p-orbitals will be equal to
- 6 electrons in the 2p-subshell
- 5 electrons in the 3p-subshell