i) Protons(p) are positively charged subatomic particles present inside the nucleus of an atom. [1 Mark]
ii) Electrons(e) are negatively charged subatomic particles that revolve around the nucleus of the atom in specific orbits. The mass of an electron is negligible as compared to that of a proton or neutron. [1 Mark]
iii) Neutron(n) does not have any charge and is present inside the nucleus of an atom. [1 Mark]