Question
Question: Which of the following statements is correct ?...
Which of the following statements is correct ?
A
(n – 1) d subshell has lower energy than ns subshell
B
(n – 1) d subshell has higher energy than ns subshell
C
(n + 1) d subshell has lower energy than nf subshell
D
nf subshell has lower energy than (n + 2) s subshell
Answer
(n – 1) d subshell has higher energy than ns subshell
Explanation
Solution
The energy of AOs depends on the
(n + l) values n + l value of (n – 1) d = n + 1 ; n + l value of ns = n
(n + l) value of (n + 1)d = n + 3 ; n + l value of nf = (n + 3)
But due to lower value of principle quantum no. energy of nf < (n + 1) d
\ energy of (n + 2) s < nf.