Proton, Neutron and Electron are the fundamental subatomic particles that make up atoms—the basic units of matter.

Proton:

• Proton has a +1 charge on it.
• They are located inside the nucleus.

Neutron:

• Neutron does not have any charge.
• They are present inside the nucleus.

Electron:

• Electron has a -1 charge on it.
• It is present in the region outside the nucleus, called the electron shell or orbitals.