Across
- 2. A particle that contains protons, neutrons, and electrons
- 4. a positively charged atom
- 6. type of bonds that transfer electrons
- 7. A ___ reaction happens when chemical bonds give off heat
- 9. Covalent bonds occur between two
Down
- 1. Type of bonds that share valence electrons
- 3. group of atoms held together by chemical bonds
- 5. negatively charged atom
- 8. Ionic bonds occur between a nonmetal and a __
- 10. The force that holds ionic bonds together