From the discharge tube experiment, it is concluded that :

Mass of proton is in fraction.

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Matter contains electrons.

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Matter contains Nucleus

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Positive rays are heavier than protons.

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Solution

The correct option is B Matter contains electrons.
Discharge tube experiment explains the particles of matter coming with glow is cathode rays having negative charge electrons.

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From the discharge tube experiment, it is concluded that :

The correct option is B Matter contains electrons.Discharge tube experiment explains the particles of matter coming with glow is cathode rays having negative charge electrons.

The correct option is B Matter contains electrons.
Discharge tube experiment explains the particles of matter coming with glow is cathode rays having negative charge electrons.