What happens to the particles of a substance when thermal energy is added to the substance?

a.) it's particles do not vibrate at all.

b.) it's particles move faster.

c.) it's particles move closer together.

it's particles move slower.

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?

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If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.