Question

Discovert of neutron,Electon and proton

Answer 1

The Electron was discovered in 1896, by the British physicist J. J. Thomson, using a cathode rays while doing discharge tube experiments. Thomson also determined e/m, ratio of the charge e to the mass m of the material particle which constituted these rays. Note that the first clues that the electron existed were first noticed by German physicist Johann Wilhelm Hittorf in 1869 when he discovered that the glow emitted from the cathode that increased in size with decrease in gas pressure. Hittorf was studding the electrical conductivity in rarefied gases.

The particle first named "corpuscles" by Thomson, it was later renamed "Electron" by a proposal of Irish physicist George F. Fitzgerald that has gained universal acceptance.

Protons are subatomic particles that, with neutrons and electrons, are the principal constituents of atoms.

Protons are positively charged particles that reside in the nucleus of an atom. These protons add the overall positive charge of a molecule. The mass of the proton is about 1,840 times the mass of the electron.