periodic crossword

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Across
  1. 1. model that shows electrons and orbitals
  2. 8. the same element with a different atomic mass
  3. 9. change the mass without effecting the properties or element
  4. 10. dull, brittle, and powdery
  5. 12. the type of properties that are shared in the groups of the periodic table
  6. 13. shiny, malleable, and good conductor
  7. 14. the rings that hold electrons
  8. 16. the rows across the periodic table
Down
  1. 2. the most common element in earths crust
  2. 3. positively charged atom
  3. 4. negatively charged atom
  4. 5. element with the symbol K
  5. 6. model that shows valence electrons
  6. 7. the columns down the periodic table
  7. 11. last name of who created the current system of the periodic table
  8. 15. an atom with a charge