Across
- 3. - What experiment led to the discovery of the electron
- 4. - An isotope that emits radioactive gamma rays an/or subatomic particles (for example, alpha and/r beta particles)
- 7. - Positive Charged Particle
- 8. - The number of protons in a nucleus
Down
- 1. - Negative Charged Particle
- 2. - Experiment Ran by Ernest Rutherford
- 5. - The total number of protons and neutrons in a nucleus
- 6. - Atoms with the same number of protons but different number of neutrons