The existence of protons in the atoms was given by Goldstein.
When electricity was passed at high voltage through a gas at a very low pressure in a discharge tube, streams of heavy particles were given at anode (positive electrode).These streams of particles are called as anode rays.
These particles were positively charged and the anode ray particles depend on the nature of the gas taken in the discharge tube.
Note: - The mass and charge of the anode ray particles depends on the nature of the gas taken in the discharge tube.
They are named as protons which are positively charged and it is found in all the atoms.
Protons are represented as p+.
Mass of proton is equal to the mass of hydrogen atom.
Therefore relative mass of proton is 1u.
Absolute mass of proton is 1840 times that of the electron.
Charge on electron is equal and opposite to the charge of the electron.
The charge on proton = 1.6 x 10-19
Relative charge is (+1) and the absolute mass of electron is 1.607 x 10-24