8
QuizMultiple Choice

Electrons and the Periodic Table — Unit test

Question 8 • Chemistry Honors A

What did Ernest Rutherford’s gold foil experiment demonstrate about an atom?

Answer
A
Each atom is composed of electrons and positive material.
B
The mass of the atom is evenly spread throughout the atom.
C
Neutrons are located in the center of the atom.
D
Positive charge occupies a very small volume in the atom.

Explanation

In Rutherford’s experiment, most alpha particles passed through the thin gold foil, but a few were sharply deflected. This showed that most of an atom is empty space and that its positive charge is concentrated in a very small central region. Therefore, the experiment demonstrated that positive charge occupies a very small volume in the atom.

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