Chemistry

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Across
  1. 3. _____model is an early atomic model depicting electrons orbiting the nucleus
  2. 4. resulting substance(s) formed in a chemical reaction
  3. 6. ________ chemical reaction absorbs heat from its surroundings during a chemical reaction
  4. 7. neutrally charged subatomic particle found in the nucleus
  5. 9. numeric factor indicating the quantity of a substance in a chemical reaction
  6. 10. positively charged particle found in the nucleus
  7. 12. _________Chemical reaction releases heat to its surroundings during a reaction
  8. 13. basic unit of matter, consisting of protons neutrons and electrons
Down
  1. 1. small number indicating the number of atoms in a molecule
  2. 2. rapid reaction with oxygen which produces water and Carbon dioxide
  3. 5. combination of substances to form a more complex product
  4. 6. negatively charged particle found in the electron cloud
  5. 8. substance entering a chemical reaction (Left side)
  6. 11. breakdown of a compound into simpler substances