Chemistry Study Guide

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Across
  1. 4. number that represents the number of protons in nucleus
  2. 5. characterized by or formed with absorbing in heat
  3. 7. electron electrons in outer most orbital or energy level
  4. 8. rare gases that have great stability and extremely low reaction rates
  5. 9. Russian chemist who created TPTOE
  6. 12. negativ charge found on the otter edge
  7. 13. regeions of spare outside of nucleus of atom where an electron may exist. Can be called orbital, shell, or energy level
  8. 14. mass of the atom
  9. 20. smallest unit of a substance
  10. 21. basic substance made of 1 kind of atom. Cannot be separated
  11. 22. brittle, not malleable or ductile, & bad conductors of heat or electricity
  12. 23. 2 or less letters to represent the element
  13. 24. result of a process
Down
  1. 1. matter can be changed from one form into another, mixtures can be separated or made, and pure substances can be decomposed
  2. 2. columns on the P.T.
  3. 3. substance that changes when it is combined with mother in a chemical reaction
  4. 6. positively charged center of atom(incredibly high density)
  5. 10. mix of both metal and non-metal. Has properties of both. Valuable in semiconductors and computer chip industry
  6. 11. characterized by or formed with giving off heat
  7. 15. smallest possible amount of a substance that has all the characteristics
  8. 16. good conductor of electricity and heat
  9. 17. fused atoms of two or more different elements
  10. 18. thin layer of metal that has been added to the outside of something
  11. 19. positivity charged in the middle of an atom
  12. 22. neutral charge found in the middle finger atom
  13. 24. rows on the P.T.