Science Crossword

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