| Atoms and Matter | | Across | | | 3. | | Negatively charged particles that circle the nucleus. | | | 5. | | The name of one of the types of quarks found in protons and neutrons. | | | 6. | | The name of one of the types of quarks found in protons and neutrons. | | | 7. | | Protons and neutrons are made up of these particles. | |
| | Down | | | 1. | | The central part of the atom. | | | 2. | | Positively charged particles found in the nucleus of the atom. | | | 4. | | Neutral particles found in the nucleus of the atom. | |
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