Chemistry · Atomic Structure
When a positively charged alpha particle is passed through a thin gold foil, most of the particles pass straight through without deflection. Based on Thomson's model of the atom, which of the following best explains why this observation was unexpected?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The positive charge was assumed to be uniformly distributed throughout the atom, with electrons embedded in it.✓
- 2Electrons revolve around the nucleus in fixed orbits.
- 3The positive charge and mass are concentrated at the centre of the atom.
- 4The atom contains a small, dense nucleus that repels alpha particles.
Correct answer
The positive charge was assumed to be uniformly distributed throughout the atom, with electrons embedded in it.
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