Periodic Table Crossword

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Across
  1. 4. / (O), six valance electrons
  2. 5. / good conductor, shiny, ductile, malleable
  3. 7. symbol / (H) (C) (O) (He) (Ne)
  4. 8. / (B) three valance electrons
  5. 9. electron / the electrons in the outermost energy level of an atom
  6. 11. / not malleable, not shiny, poor conductors, not ductile
  7. 13. metals / groups 3-12
  8. 14. / the columns in the Periodic Table
  9. 16. /elements Actinium- Lawrencium
  10. 17. / (H), one valance electrons
  11. 19. metals / first group
  12. 21. / semi-conductors, has some metal and nonmetal properties
  13. 22. /composed of two or more elements
  14. 23. gasses / eighteenth group
Down
  1. 1. mass / number of protons and neutrons in an atom
  2. 2. / the rows in the Periodic Table
  3. 3. / (C) four valance electrons
  4. 6. earth metals / second group
  5. 10. / the smallest particle in which an element can be broken down into
  6. 12. / elements Lanthanum- Lutetium
  7. 15. / having a regular, repeated pattern
  8. 17. / seventeenth group
  9. 18. / (He) two valance electrons
  10. 20. / (N) five valance electrons