Across
- 3. atom that carries an electrical charge
- 4. name of the person who discovered the neutron
- 7. (2 words) number of protons
- 10. very tiny, located outside of the nucleus, and have a negative charge
Down
- 1. (2 words) average mass
- 2. (2 words) protons+neutrons
- 5. (2 words) made up of a nucleus, protons, neutrons, and electrons
- 6. (2 words) any possible energies an electron may have in an atom
- 8. large, have no electrical charge, located in the center of atom
- 9. located in the nucleus, have a positive charge, and also large