Question

For atoms with Principle Quantum number 4, what are the possible values for (Secondary Quantum Number) and mi(Magnetic Quantum Number)?

Answer 1

Secondary quantum number (l) has values of 0 to n -1. Total values = n

Magnetic quantum number has values of - l to + l , including 0. total values = 2l +1

so for an electron off an atom having principle quantum number 4 has following possible values of secondary and magnetic quantum number.

principle quantum number (n)	secondary quantum number (l)	magnetic quantum number(ml)
4	3 ( f orbital)	-3,-2,-1,0, +1+2+3
	2 ( d orbital)	-2,-1,+1,0,+1,+2
	1 ( p orbital)	-1,0-1
	0 ( s orbital)	0