Chemistry Cross Word

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