Question

1)Compare mass of e and p

2)Charge of P, N, E

3)Discovery of subatomic particles

4)Definition of Matter


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Answer 1

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Here ur answer which I wrote and attached for u

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Answer 2

Answer 1 :

Mass of an electron = $9.109\times 10^{-31}Kg$

Mass of proton = $1.672\times 10^{-27}Kg$

Answer 2 :

Charge of proton = $+1.6\times 10^{-19}Coulombs$

Charge of neutron = 0

Charge of an electron = $-1.6\times 10^{-19}Coulombs$

Answer 3 :

The subatomic particles are proton, neutron and electron.

• Proton : Proton was discovered by the scientist Rutherford. He discovered the proton by the god foil experiment. In this experiment, Rutherford bombarded a beam of alpha-particle on the thin sheet of gold foil and then detected the scattered alpha particles in zinc sulfide screen. Most of the particles pass through the foil without deflection and some deflect at small angle.

• Electron : Electron was discovered by the scientist J. J. Thomson. He discovered the electron when he was studying the properties of cathode-rays. In cathode ray experiment, when a high electric voltage is passed through discharge tube the negatively charged particles coming out of cathode were getting attracted towards the positively charged electrode that is anode.

• Neutron : Neutron was discovered by the scientist James Chadwick. He discovered the neutron by scattering experiment. In this experiment, he bombarded a beam of alpha particle on light elements like beryllium and boron. He observed that some particles were emitted which carried no charge. That means the mass of emitted particle is equal to the mass of proton. The particle was termed as neutron.

Answer 4 :

Matter : It is defined as a substance which occupy a space and having mass.