Question

Explain the discovery of electrons
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Answer 1

Answer:

Summary. J.J. Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. Thomson proposed the plum pudding model of the atom, which had negatively-charged electrons embedded within a positively-charged "soup."

Answer 2

Answer:

J.J.Thomson carried out experiments by taking a gas at low pressure of 0.01mm Hg in a discharge tube. A discharge tube is a long glass tube having two metal plates connected to the oppositely charged poles of a battery. These metals plates are called cathode and anode. Application of high voltage results in ionisation of gas by ejection of negatively charged particles which were named as electrons. These particles originate from cathode rays.

The presence of positively charged particles in an atom had been predicted by Goldstein based on the electrical neutrality of an atom. The discovery of protons by Goldstein based on the electrical neutrality of an atom. The discovery of protons by Goldstein was done on the basis of the cathode ray experiment. The resultant positively charged ions after the ejection of electrons were found to emanate from the anode. These are called anode rays or canal rays. Anode rays or canal rays are a stream of positively charged particles. When hydrogen gas is taken in a discharge tube, the anode rays were found to be nothing but protons.The discovery of electrons and protons as subatomic particles inside the atom lead to the conception of atomic models which depict the arrangement of the fundamental particles in an atom.

Explanation:

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