periodic table

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1234567891011121314151617
Across
  1. 3. do not naturally form chemical bonds with other atoms
  2. 5. an atom that gains or loses electrons
  3. 6. a solid mixture of one or more elements
  4. 8. often occur in nature as combined elements
  5. 9. metals soft silvery in pure form and are highly reactive
  6. 12. bottom two rows of the periodic table
  7. 13. horizontal row of the periodic table
  8. 14. group 17-18
  9. 15. tend to be toxic gases or liquids in their pure form
  10. 16. vertical column of the periodic table
  11. 17. properties repeat each period of the periodic table
Down
  1. 1. stair- step between metals and nonmetals
  2. 2. the amount of energy required to completely remove an electron
  3. 4. half the distance between two nuclei of molecule
  4. 7. metals thats bond easily with nonmetals
  5. 10. organizes the elements
  6. 11. group 1-12