the periodic table

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Across
  1. 1. charged atom
  2. 5. group 17 of periodic table
  3. 6. negative ion
  4. 8. group 3-12 of periodic table
  5. 12. elements with properties
  6. 13. metallic elements
  7. 14. elements
Down
  1. 2. lacks distinctive metallic properties
  2. 3. vertical column
  3. 4. group 2 of periodic table
  4. 6. distance from the center of a atom
  5. 7. radioactive
  6. 9. gaseous element
  7. 10. high electrical & thermal conductivity
  8. 11. positive ion