Physical Science Crossward

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