The electrons identified by quantum numbers n and l:
(P) n = 5, l = 1 (Q) n = 3, l = 0
(R) n = 4, l = 2 (S) n = 2, l = 1
can be placed in decreasing order of energy as :
A
P>R>Q>S
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
S>R>Q>P
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
P>Q>R>S
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Q>R>P>S
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution
The correct option is AP>R>Q>S The n+l values of P, Q, R, and S respectively are 6, 3, 6, 3.
According to Bohr Bury's n+l rule , greater the value of n+l greate the energy. If two subshells have the same n+l value , then one with greater value of n has the greater energy.