The electronic, identified by quantum numbers n and l, (i) `n = 4, l = 1`, (ii) `n = 4, l = 0`, (iii) `n = 3,l = 2`, (iv) `n = 3, l = 1` can be placed in order of increasing energy, from the lowest to highest, as

Options

A. `(1) gt (3) gt (2) gt (4)`
B. `(3) gt (4) gt (2) gt (1)`
C. `(4) gt (2) gt (3) gt (1)`
D. `(2) gt (4) gt (1) gt (3)`

Answer

C

Explanation

`(1) = 4p, (2) = 4s, (3) = 3d, (4) = 3p`
The order of increasing energy is `3p lt 4s lt 3d lt 4p " i.e., " (4) lt (2) lt (3) lt (1)`