Scandium Bohr model

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In the scandium Bohr model, the nucleus is composed of 21 protons and 24 neutrons. Surrounding this nucleus are four electron shells, accommodating a total of 21 electrons.

To draw the scandium Bohr model, outline the 21 protons, 24 neutrons, and 21 electrons. Start by illustrating the nucleus, and then draw the four electron shells. The first three shells should contain 2, 8, and 9 electrons, respectively, while the fourth shell holds the remaining 2 electrons.

Steps

Write protons, neutrons, and electrons of scandium atom

Scandium has 21 protons, 24 neutrons, and 21 electrons.

Learn how to find: Scandium protons neutrons electrons

Draw nucleus of scandium atom

The nucleus of a scandium atom contains 21 protons and 24 neutrons. So draw the nucleus of scandium 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 21 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 21 – 2 = 19 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 21 – 10 = 11 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 9 electrons.

In the 3^rd electron shell, the 3d subshell has only one electron. 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 19 electrons in 1^st, 2^nd, and 3^rd electron shells, so we have 21 – 19 = 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 scandium atom as we have used all 21 electrons: 2 electrons in the 1^st electron shell, 8 electrons in the 2^nd electron shell, 9 electrons in the 3^rd electron shell, and 2 electrons in the 4^th electron shell.

Next: Titanium Bohr model

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Related

• Scandium

More topics

• Scandium orbital diagram
• Scandium protons neutrons electrons

External links

• File:21 scandium (Sc) enhanced Bohr model.png – Wikimedia Commons
• Chemical Elements.com – Scandium (Sc) – Chemical Elements.com
• How to draw Bohr diagram for Scandium(Sc) – Topblogtenz
• Scandium (Sc) – Periodic Table – ChemicalAid
• Why does the 3rd electron shell start filling up with scandium? – Chemistry Stack Exchange