The orbital diagram of molybdenum shows that the 1s subshell has 2 electrons, the 2s subshell has 2 electrons, the 2p subshell has 6 electrons, the 3s subshell has 2 electrons, the 3p subshell has 6 electrons, the 4s subshell has 2 electrons, the 3d subshell has 10 electrons, the 4p subshell has 6 electrons, the 5s subshell has 1 electron, and the 4d subshell has 5 electrons.

## Steps

Here’s how you can draw the orbital diagram of molybdenum step by step.

#1 Find electrons of molybdenum

#2 Write electron configuration of molybdenum

#3 Draw orbital diagram of molybdenum

Let’s break down each step in detail.

### Find electrons

The atomic number of molybdenum represents the total number of electrons of molybdenum. Since the atomic number of molybdenum is 42, the total electrons of molybdenum are 42.

### Write electron configuration

The electron configuration of molybdenum is 1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{2} 3d^{10} 4p^{6} 5s^{1} 4d^{5}.

Learn how to find: Molybdenum electron configuration

Now in the next step, start drawing the orbital diagram for molybdenum.

### Draw orbital diagram

Before drawing the orbital diagram, you should know the three general rules.

- Aufbau principle – electrons are first filled in lowest energy orbital and then in higher energy orbital
- Pauli exclusion principle – two electrons with the same spin can not occupy the same orbital
- Hund’s rule – each orbital should be first filled with one electron before being paired with a second electron

Also, you should know the number of orbitals in each subshell.

We can calculate the number of orbitals in each subshell using the formula: 2ℓ + 1

Where, ℓ = azimuthal quantum number of the subshell

For s subshell, ℓ = 0

For p subshell, ℓ = 1

For d subshell, ℓ = 2

For f subshell, ℓ = 3

So each s subshell has one orbital, each p subshell has three orbitals, each d subshell has five orbitals, and each f subshell has seven orbitals.

Now start to draw!

As mentioned above, the electron configuration of molybdenum is 1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{2} 3d^{10} 4p^{6} 5s^{1} 4d^{5}. Hence, draw the blank orbital diagram of molybdenum up to 4d subshell as follows:

In the above orbital diagram, the box represents an orbital. Each orbital has a capacity of two electrons. And the arrows (↑↓) are drawn inside the box to represent electrons.

Now 1s^{2} indicates that the 1s subshell has 2 electrons. So draw two arrows in the 1s box showing two electrons as follows:

2s^{2} indicates that the 2s subshell has 2 electrons. So draw two arrows in the 2s box showing two electrons as follows:

2p^{6} indicates that the 2p subshell has 6 electrons. So draw six arrows in the 2p box showing six electrons as follows:

3s^{2} indicates that the 3s subshell has 2 electrons. So draw two arrows in the 3s box showing two electrons as follows:

3p^{6} indicates that the 3p subshell has 6 electrons. So draw six arrows in the 3p box showing six electrons as follows:

4s^{2} indicates that the 4s subshell has 2 electrons. So draw two arrows in the 4s box showing two electrons as follows:

3d^{10} indicates that the 3d subshell has 10 electrons. So draw ten arrows in the 3d box showing ten electrons as follows:

4p^{6} indicates that the 4p subshell has 6 electrons. So draw six arrows in the 4p box showing six electrons as follows:

5s^{1} indicates that the 5s subshell has 1 electron. So draw one arrow in the 5s box showing one electron as follows:

4d^{5} indicates that the 4d subshell has 5 electrons. So draw five arrows in the 4d box showing five electrons as follows:

That’s it! This is the final orbital diagram of molybdenum as we have used all 42 electrons.

**Question:** Why does the 5s subshell have only one electron (instead of two electrons), and the 4d subshell has five electrons (instead of four electrons)?

**Answer:** A half-full 4d subshell is more stable than a partially filled 4d subshell. That’s why the 4d subshell has five electrons (instead of four electrons). And the 5s subshell has one electron (instead of two electrons).

**Next:** Tantalum orbital diagram

## Related

## More topics

- Molybdenum
- Molybdenum Bohr model
- Molybdenum electron configuration
- Molybdenum protons neutrons electrons

## External links

- https://www.numerade.com/ask/question/give-a-shorthand-orbital-diagram-for-molybdenum-12093/
- https://www.chegg.com/homework-help/questions-and-answers/-following-correct-orbital-diagram-ground-state-electron-configurastion-molybdenum-mo-z-42-q33102767

Deep

Learnool.com was founded by Deep Rana, who is a mechanical engineer by profession and a blogger by passion. He has a good conceptual knowledge on different educational topics and he provides the same on this website. He loves to learn something new everyday and believes that the best utilization of free time is developing a new skill.