Question

Which of the following is not a valid set of four quantum numbers

1,1,0,+1/2
2,0,0,+1/2
1,0,0,+1/2
2,1,0,-1/2
3,1,-1,-1/2

Answer 1

The incorrect quantum numbers are
`1,1,0,+(1)/(2)`

Step-by-step explanation:

`1,1,0,+(1)/(2)`

`n=1,l=1,m_(1)=0,m_(s)=+(1)/(2)`

It is not a valid set of quantum number, "l" value cannot be taken from "n" value.

`2,0,0,+(1)/(2)`

`n=2,l=0,m_(1)=0,m_(s)=+(1)/(2)`

This set of quantum number represents second energy level.

`1,0,0,+(1)/(2)`

`n=1,l=0,m_(1)=0,m_(s)=+(1)/(2)`

This set of quantum number represents first energy level.

`2,1,0,-(1)/(2)`

`n=2,l=1,m_(1)=0,m_(s)=-(1)/(2)`

This set of quantum number represents 2p energy level.

`3,0,0,-(1)/(2)`

`n=3,l=0,m_(1)=0,m_(s)=-(1)/(2)`

This set of quantum number represents third energy level.

Therefore, The incorrect quantum numbers are
`1,1,0,+(1)/(2)`