Question

For the quantum number lower case L = 0, how many possible values are there for the quantum number m subscrip l?

Answer 1

Quantum number L, angular quantum number, describes the shape of the orbitals. Reliable sources show that the quantum number l = 0 will give an orbital of spherical shape, polar if l = 1, and cloverleaf if l = 2.

The third quantum number is m which is is used to denote the magnetic quantum number. This describes the orientation of a certain orbital in shape. This quantum number can take the values of -l to l. Thus, the only value for m in this case is 0. m = 0.  

Quantum numbers are used to describe the position of the electrons in the orbitals.