Across
- 3. number of protons in the atom
- 5. located in the center of an atom
- 6. Sum of all the protons and neutrons in the nucleus
- 9. found in the outermost shell of the electron cloud
- 12. Created the "Plum Pudding" model of the atom
- 13. Electrons are organized in blank outside of the nucleus
- 14. Subatomic particle with a negative charge
Down
- 1. Subatomic particle with a positive charge
- 2. Surrounds the nucleus
- 4. Had the idea that atoms couldn't be created nor destroyed
- 7. and atom with a charge
- 8. Created the circle model of the atom
- 10. Another name for Avogadro's number
- 11. Created the modern model of the atom
- 15. Subatomic particle with no charge