Question

4.
10
The correct statement on the Aufbau principle is
that
(1) (n - 1)d subshell is always lower in energy
than ns orbital
(2) (n - 1)f subshell always has energy more than
np subshell
(3) 5 d is lower in energy than 4 f
(4) 6 p is lower in energy than 5 d​

Answer 1

Answer:

Option 1) is correct.

(1) (n - 1)d subshell is always lower in energy

than ns orbital

Explanation :

Refer this chart.