Atomic Physics

Models of the atom, quantised energy, radioactivity, and nuclear fission and fusion.

9 questions, free, marked as you go with a worked explanation on every one.

What this covers

• nuclear decay and half life

The questions

1. What did Rutherford's gold foil experiment reveal about the atom?
2. In the Bohr model, what happens when an electron drops from a higher to a lower energy level?
3. A radioactive isotope has a half-life of 5.0 days. What percentage of the original sample remains after 15.0 days?
4. What happens to an atom's atomic number during beta-negative decay?
5. How do nuclear fission and fusion differ?
6. Where does the energy released in a nuclear reaction come from?
7. Which statements about alpha particles are correct? Select all that apply.
8. Why did the model of the atom change over time from Thomson to Rutherford to Bohr to the quantum model?
9. Use the table. Following the same pattern, how many grams would remain after 17190 years?

Answer these free