An atom consists of three sub-atomic particles which are protons, neutrons and electrons.
Protons are positively charged, neutrons have no charge and electrons are negatively charged.
Also, it is known that both protons and neutrons reside inside the nucleus of an atom. On the other hand, electrons revolve around the nucleus of the atom.
Therefore, we can conclude that protons and neutrons are the two particles are found in the nucleus of an atom.
because the 2nd shell is not complete which is suppose to be 8 and since oxygen is 8 it first shell is 2 which is complete and the second shell which is 6 is not complete because we all know that 2+6=8 but the standard shell is
