Magic formula to find total number of orbitals in each shell

Magic formula.

There is a magic formula which helps the students to find total number of orbitals in a main shell, The following formula is very useful.

Total number of orbitals in a shell = n²

 Where n = number of shell

E.g for K, n= 1

Total number of orbitals in a shell = n²

                                                     = (1)² =1

So K shell has only 1 orbital that is s, others examples are given below.

Shell	Value of n	Formula
K	1	n2= (1)2=1
L	2	n2= (2) =4
M	3	n2= (3)=9
N	4	n2= (4)=16