julia stearns

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Across
  1. 3. Calcium Oxide
  2. 5. A number written to the right of a chemical symbol and slightly below it
  3. 6. In which only valence electrons of a particular element are shown in dots
  4. 7. Uses chemical symbols to represent the atoms of the elements and their ratios in a chemical compoun
  5. 11. The compound you have at the beginning of the reaction
  6. 12. Matter is not created or destroyed
  7. 14. AB + C= CB + A
  8. 17. Energy is released
  9. 20. A substance that initiates or accelerates a chemicla reaction without itslef being affected
  10. 21. AB= A+B
  11. 23. Tells how many atoms,molecules, or formula units take part in a reaction
  12. 24. A chemical reaction that occurs when a substance reacts with oxygen, releasing energy in the form of heat and light
  13. 27. Two non-metals
  14. 29. Sodium Fluoride
Down
  1. 1. AB + CD= AD +BC
  2. 2. Metal and a non-metal
  3. 4. Energy is absorbed
  4. 6. A chemical change in which a substance combines with oxygen, as when iron oxidizes, forming rust
  5. 8. A + B= AB
  6. 9. A change in which one or more substances are converted to a new substance
  7. 10. an outer shell electron that is associated with an atom, and that can participate in the formation of a chemical bond
  8. 13. An easier way to show a chemical reaction ,with symbols
  9. 15. Chemical compound for table salt
  10. 16. The compound you have after the reaction
  11. 18. Chemical compound for water
  12. 19. Barium Oxide
  13. 22. A mutual group of atoms held together by covalent bonds
  14. 25. Positively charged, electrons are lost
  15. 26. Atoms or groups of atoms with a charge
  16. 28. Negatively charged, electrons are gained