Thomson's cathode ray tube experiment demonstrated that

1.	Thomson's cathode ray tube experiment demonstrated that
A.	Cathode rays are streams of negatively charged ions.
B.	All the mass of an atom is essentially in the nucleus
C.	The e / m of electrons in much greater than the e / m of proton.
D.	The e / m ratio of the cathode ray particle changes when a different gas is placed in the discharge tube
Answer» D. The e / m ratio of the cathode ray particle changes when a different gas is placed in the discharge tube

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Thomson's cathode ray tube experiment demonstrated that

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