Charged Particles in Matter

What are the observations and conclusions drawn by J. J. Thomson while conducting experiments with a discharge tube for studying the properties of cathode rays? 

Describe Millikan's oil drop experiment in brief. 

How are the subatomic particles arranged in an atom according to modern structure of the atom? 

Who discovered protons? Based on what experiment was he able to discover these protons? 

Give the mass and charge of fundamental particles of an atom. 

Why was a gas at low pressure taken by Thomson while conducting the experiment? 

The mass of an electron is practically negligible as compared to the mass of a proton.

The charge of an electron was discovered by 

Charge of an electron is 

The $\mathrm{e}/\mathrm{m}$ value for proton is less than $\mathrm{e}/\mathrm{m}$ value of electron.

The mass of a proton is $1840$ times that of an electron.

Mention one point of difference between cathode rays and anode rays?

Proton is regarded as one unit of negative charge.

The $\raisebox{1ex}{$\mathrm{e}$}\!\left/ \!\raisebox{-1ex}{$\mathrm{m}$}\right.$ value of electron is $1.76\times {10}^{11}\mathrm{C}/\mathrm{Kg}$.

Mention any two properties of cathode rays.

Cathode rays do not depend upon the material of electrodes and the nature of the gas present in the cathode ray tube.

A high pressure and low voltage was applied in the cathode ray tube experiment.

What were the pressure and voltage conditions applied in the cathode ray tube experiment?

Name the subatomic particle which is absent in a hydrogen atom.

Which of the following statement is true?