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 (i) 4d (ii) 3d (iii) 4p (iv) 3d (v) 3p (vi) 4p
Their energies will be in the order:(v) `lt (ii) = (iv) lt = (iii) lt (i)`