The Electron is by far the smallest of the three. Protons are the same size and mass of the Neutron, and they are more than 1,800 times the mass of the electron.
If you don't understand that, here's some form of a table of the masses of the 3 particles:
It is the atom of deuterium. Its nucleus is composed of a proton and one neutron. The atom has one electron that is orbiting around the nucleus.
Charge of electron:- -1.602 x 10-19 CCharge of proton:-+1.602 x 10-19 CCharge of neutron= Zero.
Ion.
no
They are found in electron clouds around the nucleus.