Atoms have three particles: protons, electrons, and neutrons. The nucleus contains protons and neutrons. The outside regions of the atom are called the electron shells and have electrons.
An atom is a tiny indivisible particle.It is made up of three subatomic particles named as electrons,protons and neutrons.Protons and neutrons are located inside the nucleus of an atom and electrons revolve around the nucleus in different energy levels or shells.
Protons are positively charged.Mass of protons is equal to the mass of electrons.Neutrons are neutral.Electrons are negatively charged.
