# Beryllium Bohr model

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In the beryllium Bohr model, the nucleus houses 4 protons and 5 neutrons. Surrounding this nucleus are two electron shells, containing a total of 4 electrons.

To draw the beryllium Bohr model, represent the 4 protons, 5 neutrons, and 4 electrons. Start by sketching the nucleus, and then illustrate the two electron shells. The first shell should contain 2 electrons, and the second should house the remaining 2 electrons.

Contents

## Steps

### Write protons, neutrons, and electrons of beryllium atom

Beryllium has 4 protons, 5 neutrons, and 4 electrons.

### Draw nucleus of beryllium atom

The nucleus of a beryllium atom contains 4 protons and 5 neutrons. So draw the nucleus of beryllium 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 4 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 4 – 2 = 2 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 subshell. And the green color represents the number of electrons in that subshell. This means that the 2nd electron shell has a total of 4 electrons.

Thatâ€™s it! This is the final Bohr model of beryllium atom as we have used all 4 electrons: 2 electrons in the 1st electron shell and 2 electrons in the 2nd electron shell.

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