Across
- 4. Has no electric charger
- 6. The base unit of a chemical element
- 7. Who used the gold foil experiment?
- 8. Electrons travel in set orbits
- 10. Where are the protons and neutrons located in an atom?
- 11. What is made up of atoms
- 12. Who is credited with the modern atomic theory?
- 13. How many protons does an atom of carbon have?
Down
- 1. Who proposed the plum pudding model?
- 2. Has a negative charge
- 3. Has the same number of protons but different number of electrons
- 5. One of the first people to state that matter is made up of atoms was?
- 9. What is also the same number as the atomic number?