4
lesson pretestMultiple Choice

Pretest

Question 4 • Chemistry

Which conclusion could be made from Ernest Rutherford’s gold foil experiment?

Answer
A
The volume of the nucleus is large compared to the rest of the atom.
B
The mass of the nucleus is small compared to the rest of the atom.
C
Atoms are made up of mostly empty space.
D
Atoms are mainly solid and block alpha particles.

Explanation

In Rutherford’s experiment, most alpha particles passed straight through the gold foil, while only a few were deflected sharply. This showed that most of an atom’s volume is empty space, with its positive charge and most of its mass concentrated in a tiny nucleus. Therefore, the conclusion is that atoms are made up of mostly empty space.

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