For which of the following sets of quantum numbers, an electrons will have the highest energy ?

Options

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

Answer

B

Explanation

(b) For n=3, l=2 the subshell is 3d(n+l=5)
n=4, l=2 the subshell is 4d(n+l=6)
n=4, l=1 the subshell is 4dp(n+1)=5
n=5, l=0, the subshell is 5s(n+l=5)
According to (n+l) rule greater the (n+l) value , greater the energy that is 6.