Matter and Change to Average Atomic Mass

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Across
  1. 2. same protons and different number of neutrons
  2. 4. hypochlorous acid
  3. 7. name of carbon with 6 neutrons (don't forget dash)
  4. 9. study of matter and how it interacts and changes
  5. 12. iron (III) iodide
  6. 13. salt that has water molecules surrounding it
  7. 15. particles packed tightly but they can still slide past each other
  8. 16. number of neutrons for sodium-23
  9. 17. hydrochloric acid
  10. 18. same number of protons and electrons
  11. 22. number of electrons for palladium
  12. 24. aluminum bromide
  13. 25. calcium bicarbonate
  14. 30. mass of an element reported on periodic chart
  15. 32. zinc sulfate
  16. 33. sodium oxide
  17. 35. prefix for eight
  18. 36. more electrons than protons
Down
  1. 1. the stuff is the same afterwards; can get it back easily
  2. 3. oxygen difluoride
  3. 5. does not change in chemical reactions; it is conserved
  4. 6. you can't see the different parts of this solution with your eyes
  5. 8. atoms rearrange; can't get it back very easily
  6. 10. Can't make it any more simple with chemical means; need nuclear reaction to change it
  7. 11. pull of gravity on matter
  8. 14. gold (I) chloride
  9. 17. acids start with this
  10. 19. cobalt (II) iodide
  11. 20. basic unit of matter
  12. 21. lead (II) chlorite
  13. 23. phosphorous dichloride
  14. 26. amount of matter in an object
  15. 27. usually metal and nonmetal; charges in structure
  16. 28. particles packed very tightly; they can't move past each other
  17. 29. made of more than one type of element
  18. 31. particles packed very loosely; roughly a thousand times larger than the other two states
  19. 34. more protons than electrons