Development of the Atomic Model Quiz
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5 questions, one answer each
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1. Which scientist proposed the plum pudding model of the atom?
- A. J.J. Thomson
- B. Ernest Rutherford
- C. Niels Bohr
- D. John Dalton
2. What did the results of Rutherford's alpha particle scattering experiment show?
- A. That atoms were solid spheres with no internal structure
- B. That most of the atom is empty space, with a small, dense, positively charged nucleus
- C. That electrons were distributed evenly throughout the atom
- D. That alpha particles could not penetrate atoms
3. Dalton's solid sphere model was later replaced. Which model directly replaced it and why?
- A. Thomson's plum pudding model, because new evidence showed electrons existed
- B. Bohr's shell model, because electrons move in circular orbits
- C. The nuclear model, because atoms contain a nucleus and empty space
- D. Chadwick's model, because neutrons were discovered
4. According to Niels Bohr's model of the atom, what is the significance of electron shells?
- A. They represent the only places where electrons can exist
- B. They are fixed regions where electrons orbit the nucleus at specific distances with set energy levels
- C. They are concentric circles that gradually expand outwards
- D. They explain why some atoms are radioactive
5. How did the discovery of neutrons by James Chadwick further develop the atomic model?
- A. It proved that electrons were not in shells around the nucleus
- B. It showed that the nucleus contained both protons and neutrons, explaining the difference between mass number and atomic number
- C. It demonstrated that alpha particles could be used to identify elements
- D. It provided evidence that the plum pudding model was correct