Cobalt Bohr model

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The cobalt Bohr model depicts a nucleus with 27 protons and 32 neutrons. Surrounding this nucleus are four electron shells, housing a total of 27 electrons.

To draw the cobalt Bohr model, represent the 27 protons, 32 neutrons, and 27 electrons. Begin by sketching the nucleus, and then draw the four electron shells. The first three shells should contain 2, 8, and 15 electrons, respectively, while the fourth shell holds the remaining 2 electrons.

Steps

Write protons, neutrons, and electrons of cobalt atom

Cobalt has 27 protons, 32 neutrons, and 27 electrons.

Learn how to find: Cobalt protons neutrons electrons

Draw nucleus of cobalt atom

The nucleus of a cobalt atom contains 27 protons and 32 neutrons. So draw the nucleus of cobalt atom as follows:

Now in the next step, draw the 1^st electron shell and start marking electrons.

Draw 1^st electron shell

Remember that we have a total of 27 electrons.

The 1^st electron shell (containing s subshell) can hold up to a maximum of 2 electrons. So draw the 1^st electron shell as follows:

In the above image, 1 represents the 1^st electron shell that contains 1s subshell. And the green color represents the number of electrons in that subshell. This means that the 1^st electron shell has a total of 2 electrons.

Since we have already used 2 electrons in the 1^st electron shell, now we have 27 – 2 = 25 electrons left. So in the next step, we have to draw the 2^nd electron shell.

Draw 2^nd electron shell

The 2^nd electron shell (containing s subshell and p subshell) can hold up to a maximum of 8 electrons. So draw the 2^nd electron shell as follows:

In the above image, 2 represents the 2^nd electron shell that contains 2s and 2p subshells. And the green and orange color represents the number of electrons in that subshell. This means that the 2^nd electron shell has a total of 8 electrons.

Now we have already used 10 electrons in 1^st and 2^nd electron shells, so we have 27 – 10 = 17 electrons left. So in the next step, we have to draw the 3^rd electron shell.

Draw 3^rd electron shell

The 3^rd electron shell (containing s subshell, p subshell, and d subshell) can hold up to a maximum of 18 electrons. So draw the 3^rd electron shell as follows:

In the above image, 3 represents the 3^rd electron shell that contains 3s, 3p, and 3d subshells. And the green, orange, and pink color represents the number of electrons in that subshell. This means that the 3^rd electron shell has a total of 15 electrons.

In the 3^rd electron shell, the 3d subshell has only seven electrons. This is because according to the aufbau principle, the 4s subshell is filled first and then 3d, 4p, 5s… and so on.

Now we have already used 25 electrons in 1^st, 2^nd, and 3^rd electron shells, so we have 27 – 25 = 2 electrons left. So in the next step, we have to draw the 4^th electron shell.

Draw 4^th electron shell

The 4^th electron shell (containing s subshell, p subshell, d subshell, and f subshell) can hold up to a maximum of 32 electrons. So draw the 4^th electron shell as follows:

In the above image, 4 represents the 4^th electron shell that contains 4s subshell. And the green color represents the number of electrons in that subshell. This means that the 4^th electron shell has a total of 2 electrons.

That’s it! This is the final Bohr model of iron atom as we have used all 26 electrons: 2 electrons in the 1^st electron shell, 8 electrons in the 2^nd electron shell, 15 electrons in the 3^rd electron shell, and 2 electrons in the 4^th electron shell.

Next: Nickel Bohr model

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Related

• Cobalt

More topics

• Cobalt orbital diagram
• Cobalt protons neutrons electrons

External links

• File:27 cobalt (Co) enhanced Bohr model.png – Wikimedia Commons
• Chemical Elements.com – Cobalt (Co) – Chemical Elements.com
• Cobalt (Co) – Periodic Table – ChemicalAid
• What is the Bohr model for Cobalt? – Topblogtenz
• How to Make a Cobalt Atom Model – Sciencing