What is the range of possible values for ML?

The appropriate range for the magnetic quantum number (ML) is determined by the azimuthal quantum number (L), which indicates the subshell of the electron. For any given value of L, ML can take on values that are integer multiples from -L to +L. This means that for a specific value of L, the allowable values of ML are (-L, -L+1, ..., 0, ..., L-1, L).

Consequently, the complete set encompasses a total of 2L + 1 possible values. For example, if L is 2 (representing a d subshell), the possible values for ML would be -2, -1, 0, 1, and 2, corresponding to a total of five distinct values (2*2 + 1 = 5).

This understanding of ML directly relates to how electrons are arranged within an atom and provides insight into their behavior in magnetic fields.