Chemistry Crossword

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Across
  1. 3. Degradation Of a material Over time
  2. 6. Substance that accelerates a chemical reaction
  3. 7. A Table of the elements organized by number
  4. 8. Chemical process in which a substance reacts rapidly with oxygen and give off heat
  5. 9. Signs that appear on Hazardous Materials
  6. 11. in a Chemical Reaction the mass of the reactants and will stay the same
  7. 18. Substances that make products
  8. 19. Created by reactants
  9. 20. Elementary particle with no charge
  10. 22. he basic unit of a chemical element
  11. 23. negative charge
  12. 24. Natural Catalyst in your saliva
  13. 25. a particle that is electrically charged negative postive
Down
  1. 1. When none of the reactants/products can escape an experiment
  2. 2. positive charge
  3. 4. The order of the element in the Periodic table
  4. 5. When one metal and one non metal combine to make a new subbsantce
  5. 10. the positively charged central core of an atom
  6. 12. how heavy the atom is
  7. 13. when some of the reactants/products can escape
  8. 14. when substances react to create a new substance
  9. 15. Absorbing energy (heat)
  10. 16. the most reactive metal
  11. 17. when a metal and a nonmetal combine
  12. 21. the most reactive non metals