Explanations:
An atom is made of the nucleus (which is made up of proton and neutron) and the electrons that revolve around the orbital (or shell).
From the given atomic structure, the proton (in red color) and neutron (in green color) are contained within the nucleus. The electron is revolving around the orbital (in blue color) while the circles are the shells.
The electrons are located along the shells and each subshell has a maximum number of electrons it can contain.
The first atomic shell can only hold a maximum number of 2 electrons (duplet rule) while the second and the third shell can both hold a maximum number of 8 electrons (octet rule) each.
Find the sketch of the diagram below;
Atomic shell 1 - 2 electrons
Atomic shell 2 - 8 electrons
Atomic shell 3 - 8 electrons