Question

Q.04 Which one of the following statements in relation
to the hydrogen atom is correct?
11​

Answer 1

Answer:

The statements (A), B) and (C) in relation to the hydrogen atom are correct.

(A) 3s−orbital is lower in energy than 3p−orbital.

(B) 3p−orbital is lower in energy than 3d−orbital.

In fact, the electrons are filled in the order 3s, 3p, 4s and 3d.

For 3s orbital (n+l)=(3+0)=3

For 3p orbital (n+l)=(3+1)=4

For 3d orbital (n+l)=(3+2)=5

As the value of (n+l) increases, the energy of the orbital increases.

Explanation: