The periodic table

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Across
  1. 3. the symbol of this element is Ag
  2. 6. bones made up of
  3. 9. the only gas in group one
  4. 10. the symbol of this group is Sg
  5. 11. A group that has Hydrogen in it
  6. 12. a group that is called noble gases
  7. 13. the atomic number is 87.62 and it's in group two
  8. 16. group that is called pnictogens
  9. 17. number of groups in the periodic table
  10. 18. shiny and electric conductors
Down
  1. 1. have to be colored in yellow
  2. 2. group that is called pnictogens
  3. 4. symbol for this element is Ga
  4. 5. a group that do not occur elemntary in nature and low density
  5. 7. semi-conductor
  6. 8. groups that ends with 'ide' groups thirteen to eighteen
  7. 11. seventeen a group that is called halogens
  8. 14. the dymbol is Fe
  9. 15. brittle and fragile
  10. 16. a group that is called akaline earth metals