Question

PLEASE PLEASE HELP!

The orbital diagram below is written incorrectly. Why?

A. The number of electrons used is incorrect.

B. The orbitals are not in the correct sequence.

C. The orbital diagram violates Hund's rule.

D. The electrons are all paired.

Answer 1

Answer:

The answer to your question is: letter C

Explanation:

Hund's rule: states that electrons always enter an empty orbital before they pair up.

In this exercise, we notice that orbital p has three suborbitals, then,

we must start filling each suborbitals with one electrons and after that we start to pairing them up.

The result must be,

1st suborbital with 2 electrons

2nd suborbital with 1 electron

3 rd suborbital with 1 electron

Answer 2

Answer :  The option is, (C)

Explanation :

According to Hund's rule, one electron per orbital is placed within a sublevel before pairing them.

As we are given that:

The electron configuration of atom is: $1s^22s^22p^4$

The two electrons present in 2s will occupy the same orbital, whereas the 4 electrons present in 2p will be in different orbital (that means the electrons aligned in the same direction) in accordance with Hund's rule which is not shown in diagram.

The correct orbital diagram is shown below.