vocab crossword puzzle

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Across
  1. 1. positive charge, lost electrons
  2. 5. basic unit of chemical element
  3. 8. positive charge in nucleus
  4. 9. the rows on the periodic table
  5. 11. number of electrons in outer shell
  6. 12. chemical substance that has a reaction
  7. 14. negative charge, gained electrons
  8. 17. semiconductor, between metal/non-metal
  9. 19. elements in groups IVB-VIII
  10. 22. negative charge in nucleus
  11. 23. measures from nucleus to shell
Down
  1. 2. atoms that have a different # of neutrons
  2. 3. solid, shiny, malleable, ductile
  3. 4. atom that's more positive/negative
  4. 6. the columns on the periodic table
  5. 7. element/substance that isn't metal
  6. 10. 5 or 6 elements in the periodic table
  7. 13. an atom with a net electric charge
  8. 15. core of an atom
  9. 16. no charge in nucleus
  10. 18. elements in group IA
  11. 20. 7 elements that make up group 18
  12. 21. properties of electrons in set values