Perioidic Table Crossword

123456789101112131415161718
Across
  1. 4. formula contains coefficicent and subscript
  2. 7. mass # - atomic # = # of neutrons
  3. 9. shiny,ductile,good conductors
  4. 12. semi-conductors
  5. 13. verticial columns
  6. 16. negatively charged
  7. 18. a substance produced during a natural, chemical, or manufacturing process
Down
  1. 1. table a table that organizes the known elements by order of increasing atomic #
  2. 2. atomic # = # of protons= # of electrons
  3. 3. dull,brittle,poor conductor
  4. 4. the big #;multiply all subscripts by the coefficient
  5. 5. mass round to mass #
  6. 6. a substance that takes part in and undergoes change during a reaction
  7. 8. little #;indicates the number of atoms of an element
  8. 10. postively charged
  9. 11. electrons only the electrons in the outer most shell
  10. 14. numbers arranged in groups known as energy levels
  11. 15. the smallest units of an element
  12. 17. neutral charge