| __ | 1. | Electrons are located in the | | A. | positive |
| __ | 2. | Model that is used for atoms | | B. | negative |
| __ | 3. | Number of electrons 1st shell | | C. | Eight |
| __ | 4. | Number of electrons 2nd shell | | D. | shells |
| __ | 5. | Number of protons determine | | E. | neutral or zero |
| __ | 6. | Particles inside the nucleus | | F. | nucleus |
| __ | 7. | Protons are located in the | | G. | Two |
| __ | 8. | The charge of an electron is | | H. | neutrons |
| __ | 9. | The charge of a neutron is | | I. | the element's identity |
| __ | 10. | The charge of a proton is | | J. | Bohr |