Physics - Radioactivity Pt. 2 (AQA Additional Science - P2)

These questions are on the discovery of the nucleus (Rutherford, Geiger and Marsden and their alpha particle scattering, in which they alpha particles at thin gold foil.) 

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  • Created by: Belvast
  • Created on: 22-05-13 01:22
Why do most alpha particles pass straight through gold foil?
Because most of the atom is empty space.
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Why do some alpha particles deflect from the gold foil?
Because the nucleus has a positive charge. When they collide with a positive particle in the foil, they automatically repel.
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What did the alpha scattering experiment suggest about the structure of the nucleus?
That this is where the mass of the atom is mostly concentrated, that it is small and positively charged.
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Why do a few rebound through very large angles?
Nucleus of these atoms has a large mass and a very large positive charge.
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What is the 'plum pudding' model of an atom?
The common theory that atoms consisted of spheres of positive charge with electrons stuck into them. This changed after the alpha scattering experiment.
5 of 5

Other cards in this set

Card 2

Front

Why do some alpha particles deflect from the gold foil?

Back

Because the nucleus has a positive charge. When they collide with a positive particle in the foil, they automatically repel.

Card 3

Front

What did the alpha scattering experiment suggest about the structure of the nucleus?

Back

Preview of the front of card 3

Card 4

Front

Why do a few rebound through very large angles?

Back

Preview of the front of card 4

Card 5

Front

What is the 'plum pudding' model of an atom?

Back

Preview of the front of card 5

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