The fundamental particle of an atom are: electron, proton and neutron .


s.n
Name of atomic particles Location Relative mass Charge
1 Electron (i) Shell 1/1837 .1
2 Proton (p⁺) Nucleus 1 +1
3 Neutron (n⁰) Nucleus 1 0
Atoms are made up of three sub-atomic particles: protons, electrons and neutrons.
An electron is a negatively charged particle found in the atom of all the elements.
The mass of an electron is about 1/1840 mass of all the hydrogen atoms.
The mass of hydrogen atom is 1 a.m.u.
A proton is a positively charged particle found in the atom of all the elements.
Protons are located in the nucleus of an atom.
A neutron is a neutral particle found in the nucleus of an atom.