5.6 Rutherford's Experiment

Select all that apply. What is an alpha particle?

• 2 protons and 2 neutrons

• 2 protons and 2 electrons

• 2 neutrons and 2 electrons

• a helium nucleus

• a helium nucleus without electrons

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When performing his experiment, Rutherford observed that

• all alpha particles passed through the gold foil without deviation

• most alpha particles passed through the gold foil without deviation

• most alpha particles deviated course when passing through the gold foil

• all alpha particles deviated course when passing through the gold foil

The alpha particles that deviated did so as a result of

• an attractive electric field emitted by the gold nucleus

• a repulsive electric field emitted by the gold nucleus

• an attractive gravitational field emitted by the gold nucelus

• a repulsive magnetic field emitted by the gold nucleus

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Select all that apply. From his observations, Rutherford concluded that

• most of an atom's volume is empty space

• most of an atom's mass comes from a positively charged nucleus, which takes up most of the atom's volume

• most of an atom's mass comes from a positively charged nucleus, which takes up a small amount of the atom's volume

• electrons move in orbits in the relatively large empty space around the nucleus

• electrons move in orbits in the relatively small empty space around the nucleus

Rutherford's experiment was the start of

• Newtonian physics

• quantum physics

• particle physics

• thermal physics