Using a proton charge 1.602*10^-19 coulombs is equal to proton mass 1.673*10^-27 Kg. Therefore One coulomb is equal to 1.044*10^-8Kg.

The ratio of charge/mass of a proton is 9.58 x 104C/g and that of the electron is 1.76 x 108C/g.

Charge to Mass Ratio of Electron

1. m = mass of an electron in kg = 9.10938356 × 10-31 kilograms.
2. e = magnitude of the charge of an electron in coulombs = 1.602 x 10-19 coulombs.

electron

Charge by Mass Ratio of an Electron = 1.602 10-19 coulombs.

In conclusion 1.045*10-8 Kg of matter contains a maximum of 1 coulomb of positive charge. This means 1Kg of matter contains a maximum of 95698925 coulombs of positive charge. This constant is approximately equal to a proton mass to charge ratio. It is also approximately equal to a plank mass.

Why does the charge to mass ratio of anode rays depend on the gas from which it originates? The different gases have different types of positive rays,that contain particles of different mass and charge. Therefore, the charge to mass ratio of anode depends on the gas. This ratio is not constant.

J.J. Thomson

Answer: Knowing the charge to mass ratio allows us to calculate the mass by measuring charge effects. Since the force on a charged particle is proportional to its charge, the deflection of a beam of charged particles will be the same for all particles with the same charge to mass ratio.

An electron is a fundamental particle. All electrons have the same mass (9.1 x 10^-31 Kg) and charge (- 1.6 x 10^-19 Coul) so that e/m is constant. (Values of mass and charge are rounded off for this answer).

By definition, one coulomb is the charge carried by a current of one ampere that flows for one second: 1 C = 1 amp-s. When Thomson’s data are converted to SI units, the charge-to-mass ratio of the particles in the cathode-ray beam is about 108 coulomb per gram.

When electric fields are applied to the cathode rays, they are deflected upward. Thus he established the electric charge. Thus the cathode rays have both mass and charge.