Chemistry Review

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Across
  1. 2. type of endothermic reaction that use the sun as a energy resource.
  2. 3. The most reactive metal.
  3. 5. variable that is being measured or tested in an experiment.
  4. 9. what metal is found at the bottom of the reactivity series.
  5. 12. smallest unit into which matter can be divided without the release of electrically charged particles.
  6. 14. Exothermic reaction that occurs in the cells.
  7. 15. laboratory technique for the separation of a mixture into its components.
  8. 16. Acid that contains Hydrogen and chlorine.
  9. 17. protons and neutrons are in the center.
  10. 19. variable that is being changed in an experiment.
  11. 20. Gas formed when a metal and acid react.
Down
  1. 1. negative charge
  2. 4. this metal reacts with oxygen, it creates FeO.
  3. 6. takes energy from the surroundings.
  4. 7. Reaction that increase the temperature.
  5. 8. Acid that contains hydrogen, sulfur and oxygen.
  6. 10. First man to think about atoms.
  7. 11. NaCl
  8. 13. a reactive metal that burns very bright light.
  9. 18. Neutral charge