For which one of the following sets of four quantum numbers, an electron will have the highest energy?

Options

A. `{:(,n,l,m,s),("(a)",3,2,1,1//2):}`
B. `{:(,n,l,m,s),("(b)",4,2,-1,1//2):}`
C. `{:(,n,l,m,s),("(c)",4,1,0,1//2):}`
D. `{:(,n,l,m,s),("(d)",5,0,0,-1//2):}`

Answer

B

Explanation

The sub-shell are 3d, 4d, 4p and 4s, 4d has highest energy as n + I value is maximum for this.