Atoms and Molecules

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Across
  1. 3. a process in which one or more substances are converted to one or more different substances
  2. 4. a reaction in which atoms of the reactant rearrange to create different substances as products
  3. 6. negative charge
  4. 8. a substance that changes when it is combined with another substance in a chemical reaction
  5. 9. smallest part of a substance; cannot be broken down chemically
  6. 11. neutral electric charge (neither positive nor negative)
  7. 12. what holds atoms together in molecules
Down
  1. 1. a reaction in which a change to the physical properties of a material or substance occurs
  2. 2. positive charge
  3. 5. houses electrically positive protons and electrically neutral neutrons
  4. 7. substances produced at the end of a chemical reaction
  5. 10. the smallest unit of a substance that has all the properties of that substance; can be broken down into atoms