Charged Particles in Matter

J. J. Thomson (in 1897) found that cathode ray tubes produced beams of small particles that could be deflected (bent) by an electric field.
He found that these rays were beams of negatively charged particles, which were named _____. 

In 1932, Chadwick discovered _____ , by bombarding metal targets with radiation from radioactive material.

Protons are represented as:

Dalton's atomic theory proposed that all _____ was composed of atoms, indivisible and indestructible building blocks.

State and explain the Dalton's atomic theory.

"All the matter is made up of very small particles called atoms", stated by Dalton.

What are the five main points of Dalton's atomic theory?

The symbol of the electron is _____ .

The symbol of the proton is '${\mathrm{e}}^{-}$'.

What is the symbol of electrons?

What is the symbol of proton?

The charges of proton and electron are of equal magnitude.

Give the name of the fundamental particle whose relative charge is $-1$.

Name the subatomic particle whose relative charge is $+1$.

Millikan's method is used for the determination of _____ of an electron.

What is the charge on an electron?

Dalton's atomic theory says that atoms are indivisible. Is this statement still valid? Give reasons for your answer.

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

Compare the properties of electron, proton and neutron.

Which type of charge is present on electron?