Chemistry Crossword Renze Torres 9B

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Across
  1. 5. An experiment in which one or more products of a chemical reactions can escape
  2. 6. A temperature where the solid melts
  3. 7. This change is reversible
  4. 9. This change is non reversible
  5. 13. The process of burning
  6. 14. A chemical reaction that takes place in cells
  7. 17. Pure substance formed when at least one metal and non metal combine
  8. 19. chemical reaction that absorbs energy
  9. 20. A substance produced by a living organism that acts as a catalyst
  10. 21. A system easy to see warning symbols on hazardous materials
  11. 23. chemical reaction that releases energy
  12. 24. A substance that helps a chemical reaction to proceed more quickly
Down
  1. 1. Substance made up of one atom
  2. 2. A substance that changes during a reaction
  3. 3. law of conservation
  4. 4. an organic catalyst
  5. 6. Pure substance when formed when nonmetals combine
  6. 8. A table in which elements are organized by their physical and chemical properties
  7. 10. Anything that has mass and occupies space
  8. 11. An experiment in which all reactants and all products of a chemical reaction are accounted for
  9. 12. Number of protons in the nucleus of one atom of an element
  10. 15. A temperature at where the liquid turns into vapour
  11. 16. An atom that has become electrically charged because it has lost or gained electrons
  12. 18. Of an element calculated from the total number of protons, neutrons, and electrons of that atom
  13. 22. The process of corroding metal, stone, or other materials