Question

From his experiments, J. J. Thomson concluded that

cathode ray particles can move at very fast speeds.

cathode ray particles can be moved by electric current

atoms contain small positively charged particles that are called protons.

atoms contain small negatively charged particles that are called electrons.

Answer 1

he discovered that atoms contained small charged particles that are called electrons.

Answer 2

J. J. Thomson from his experiments concluded that , atoms contain small negatively charged particles that are called electrons ,therefore option (d) is correct.

What are the postulates of J.J Thomson experiment?

J.J. Thomson proposed that an atom consists of a uniform sphere in which positive charge is uniformly distributed . He was the first  one of the many scientists who proposed models for the structure of an atom.

Postulates of model are as below-

• An atom consist of positively charged sphere and electron are embedded in it

• The negative and positive charges are equal in magnitude so the atom as a whole is electrically neutral Drawback of J.J Thomson.

J. J. Thomson from his experiments concluded that , atoms contain small negatively charged particles that are called electrons ,hence option (d) is correct.

Learn more about J.J Thomson experiment ,here:

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