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Modern Physics — Test Answers

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What is the best explanation for why a particle is striking point X?

A
Alpha particles are mostly empty space, so they move in random directions, and one of these alpha particles can strike point X.
B
The gold atoms contain negative electrons, so when alpha particles strike the gold they keep moving but in various directions.
C
When the dense, positive alpha particle passes close to a positive nucleus of gold, the alpha particle repels and hits the screen at point X.
D
If an alpha particle hits the gold foil, a gold nucleus splits and a particle from it flies out at point X.

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