electron

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

Neutron

Alpha particle is a helium nucleus that comprises two protons and two neutrons, and the charge is twice the charge of the proton while the mass is around four times greater. Mass of helium = 4m….Thank you.

Thus if q is perpendicular, ti experiences force and follows parabolic path and largest derivation of D is seen,thus me​ is max.

Electron

Theatoms break down into negatively charged particles and positively charged particles. 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.

It is equal to the ratio of e/m for an electron. This is because cathode rays consist of electrons. The e/m ratio does not depend on the type of gas filled in the discharge tube. For only the cathode rays, the constituent particle always remains the same that is why the ratio is the same.

e/m ratio of protons is not constant.

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. This constant applies to all matter.

A similar calculation for the proton, with charge e = 1.6 x 10-19 Coulomb and e / M = 9.6 x 107C/kg leads to a value of 1.67 x 10-27 kg for the mass of a proton.

Option (c) is the right answer. Proton is an ionised hydrogen atom. : According to the sources of chemistry the Ionised hydrogen is termed to be positively charged. : This happens when a hydrogen atom will lose one of it’s electron and hereby is left with only one proton.

Ernest Rutherford

(a) Volume of proton is approximately (-4/3 nr) = 1.5×10-38 cm3.

Proton, stable subatomic particle that has a positive charge equal in magnitude to a unit of electron charge and a rest mass of 1.67262 × 10−27 kg, which is 1,836 times the mass of an electron. …

Option (c) is the correct answer. The e/m ratio of an alpha particle is similar to deuterium. The e/m ratio of an alpha particle is 4.82245111 x 10^7 C/kg.

e/m for electron is 1/0 (as electron has negligible mass), for proton is 1/1, for neutron is 0/1, and for alpha particle is 2/4 or 1/2.

so, the e/m ratio becomes:

1. D+=e2m.
2. H+=em.
3. He+=e4m.
4. He2+=2e4m.

For H atom the charge is 0 so e/m ratio will be 0 whereas for ; the value of e is 1 and mass is also 1.

hydrogen