PSC End of Year Exam

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Across
  1. 5. the vertical column on the periodic table
  2. 6. positively charged particles
  3. 7. first found the proton
  4. 10. this law states that mass can not be created or destroyed, just transferred
  5. 12. the rule that explains an atom need 8 valence electrons to be stable
  6. 15. unit that measures nuclear radiation exposure to humans
  7. 16. two atoms of the same element that makes a molecule
  8. 18. the name given to the combining ability of an atom when forming a compound
  9. 21. the horizontal rows on the periodic table
  10. 22. negatively charged particles
  11. 23. elements on the left side of the zig-zag line
  12. 24. the positive charged particle found in the nucleus of an atom
  13. 25. first found the electron
  14. 27. means "yeild" or "to produce"
  15. 29. name of group 18, the only stable group
  16. 30. another name for a homogeneous mixture
  17. 31. the large number in front of a compound
  18. 32. substance being dissolved
Down
  1. 1. a substance that conducts electricity when in a water solution
  2. 2. a suspension is this type of mixture
  3. 3. the small number to the right of an element
  4. 4. the sum of oxidation numbers in a compound
  5. 8. the process of an ionic compound releasing ions when dissolved in water
  6. 9. name for water
  7. 11. elements that make up a compound and the number of atoms
  8. 13. a chemical compound containing only 2 different elements
  9. 14. identifies the element
  10. 17. substance doing the dissolving
  11. 19. unit that measures nuclear radiation exposure to the environment
  12. 20. elements with 7 valence electrons
  13. 26. first published the periodic table in 1869
  14. 28. number of valence electrons for an atom to be stable