The quantum numbers of six electrons are given below. Arrange them in order of increasing energies. If any of these combination(s) has/have the same energy lists:
` 1. n=4 , l=2 , m_(i) =-2, m_(s) =-1//2 `
`2. n=3 , l=2 , m_(l) =1 , m_(s) =+1//2`
3.`n=4 , l=2 ,m_(l)=-2, m_(s) =-1//2`
4. ` n=3 , l= 2, m_(i) =-1 , m_(s) = +1//2`
5. ` n=3 , l=1 , m_(l) =-1 , m_(s) = +1//2`
`n=4 , l= 1 , m_(l) =0 , m_(s) =+1//2`

Explanation

The orbitals occupied by the electrons are
a. `4d, b. 3d, c. 4p, d. 3d`,
e. `3p, f. 4p`
There energies will be in the order
`(e) lt (b)=(d) lt (f)=(c ) lt (a)`