Development of atomic models Quiz
Studying this course? Keep your progress in one place.
Pick an answer for each. Quizzes never use energy.
5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. Who first showed that atoms contain negatively charged electrons?
- A. Dalton
- B. Rutherford
- C. Bohr
- D. Thomson
2. In the gold foil experiment, which observation showed that atoms are mostly empty space?
- A. Most alpha particles passed straight through
- B. A few alpha particles bounced back
- C. Alpha particles were absorbed by the gold
- D. Gold foil glowed
3. Why did a few alpha particles bounce almost straight back?
- A. They hit electrons
- B. They were repelled by a small, dense, positive nucleus
- C. They were attracted to the whole atom
- D. They were too slow
4. Which model has electrons in fixed shells?
- A. Dalton's model
- B. Plum pudding model
- C. Bohr's model
- D. Thomson's solid sphere
5. Why do scientific models change?
- A. Scientists dislike old ideas
- B. New evidence cannot be explained by the old model
- C. Models are only guesses
- D. Newer scientists are always right