Argon Bohr model

The argon Bohr model has a nucleus with 18 protons and 22 neutrons. Surrounding this nucleus are three electron shells, holding a total of 18 electrons.

To draw the argon Bohr model, represent the 18 protons, 22 neutrons, and 18 electrons. Start by illustrating the nucleus, and then draw the three electron shells. The first two shells should contain 2 and 8 electrons, respectively, while the third shell holds the remaining 8 electrons.

Contents

Steps

Write protons, neutrons, and electrons of argon atom

Argon has 18 protons, 22 neutrons, and 18 electrons.

Draw nucleus of argon atom

The nucleus of an argon atom contains 18 protons and 22 neutrons. So draw the nucleus of argon atom as follows:

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

Draw 1st electron shell

Remember that we have a total of 18 electrons.

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

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

Since we have already used 2 electrons in the 1st electron shell, now we have 18 β 2 = 16 electrons left. So in the next step, we have to draw the 2nd electron shell.

Draw 2nd electron shell

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

In the above image, 2 represents the 2nd 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 2nd electron shell has a total of 8 electrons.

Now we have already used 10 electrons in 1st and 2nd electron shells, so we have 18 β 10 = 8 electrons left. So in the next step, we have to draw the 3rd electron shell.

Draw 3rd electron shell

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

In the above image, 3 represents the 3rd electron shell that contains 3s and 3p subshells. And the green and orange color represents the number of electrons in that subshell. This means that the 3rd electron shell has a total of 8 electrons.

Thatβs it! This is the final Bohr model of argon atom as we have used all 18 electrons: 2 electrons in the 1st electron shell, 8 electrons in the 2nd electron shell, and 8 electrons in the 3rd electron shell.

Next: Gallium Bohr model