Across
- 2. _______particle tracks that are straight
- 3. center of the atom
- 5. tracks are faint and change direction suddenly
- 8. Marie Curie won a nobel Prize in this field in 1903
- 10. Lady recognized for her discovery of radium
- 12. elements that have the same proton number but different neutron number
- 13. Na on the periodic table
- 14. proton number + neutron number
Down
- 1. device used to detect ionizing radiation
- 4. number of protons in gold
- 6. negatively charged particles orbiting the nucleus
- 7. element named after curie's homeland
- 9. mass number for Carbon
- 11. Cl on the periodic table