that describes the orientation of the orbital angular momentum of an atomic electron relative to an arbitrarily chosen 
-axis. [P8.3]
is: the quantum number that describes the orientation of the orbital angular momentum of an atomic electron relative to an arbitrarily chosen -axis. [P8.3]
may have: any value ranging from 
to 
where 
is the orbital angular momentum quantum number, implying that the -component of the orbital angular momentum vector may take on any value 
[P8.3]
labels: degenerate energy levels within a subshell in an atom. [P8.3]
Copyright 1997, The Open University