Question on Quantum Numbers

What is the correct set of quantum numbers for the unpaired electron in a chlorine atom?

Answer:

The atomic number of chlorine is 17. Its electronic configuration is 1s² 2s²2p⁶3s²3p⁵. From the electronic configuration we can see that is has an unpaired electron in a 3p sub-shell. So, the quantum numbers would be n = 3; l = 1; m = + 1; s = +/- ½