Periodic table

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Across
  1. 2. the smallest number next to an element
  2. 5. the columns of the periodic table
  3. 6. these elements are fully stable
  4. 7. nonmetals make these
  5. 9. the number of protons + neutrons
  6. 10. the rows of the periodic table
  7. 13. same number as element's group no
  8. 14. Carbon 12 Is this
  9. 16. same numbers as element's period no
Down
  1. 1. nonmetal and nonmetal bond
  2. 3. metals make these
  3. 4. Copper and Iron are these
  4. 8. react with Na
  5. 11. the elements on the left
  6. 12. the elements to the right
  7. 15. nonmetals and metals bonding