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General Chemistry

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Interpreting Cathode Ray Tube Experiments

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Recall in the cathode ray tube (CRT) experiments that atoms were subjected to high voltages resulting in the ejection of smaller pieces of matter providing the first suggestion that atoms were composed of smaller components.

Suppose that the following was observed when sample X was subjected to high voltage. Note that two streams of particles (A and B) were detected.

Created for Albert.io. Copyright 2016. All rights reserved.

Which of the statements below provides the best plausible interpretation of this experiment?

A

X contains two smaller pieces, both with (+) charge. These two pieces are the same mass.

B

X contains two smaller pieces, both with (-) charge. Piece A has a greater mass than piece B.

C

X contains two smaller pieces, both with (-) charge. Piece B has a greater mass than piece A.

D

X contains two smaller pieces, both with (-) charge. These two pieces have the same mass.

E

X is composed of a more massive piece that has a positive charge and a less massive piece of negative charge.