bonding and nomenclature

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Across
  1. 2. number of valence electrons in Sr
  2. 6. negative ion
  3. 7. complete transfer of electron(s)
  4. 9. bond between metals
  5. 11. N2O5
  6. 13. MgO
  7. 16. As2O3
  8. 17. metallic bonds are nuclei in a ___________________
  9. 21. structure formed by ionic compounds
Down
  1. 1. KN3
  2. 3. water
  3. 4. sharing of electrons between atoms
  4. 5. type of bond formed between metal and nonmetal
  5. 8. number of electrons nitrogen tries to obtain
  6. 10. positive ion
  7. 12. type of bond formed between nonmetals
  8. 14. result of the combination of metals
  9. 15. the number of valence electrons in Cl
  10. 18. the common charge an ion has is the _____ number
  11. 19. cesium chloride
  12. 20. numbe of electrons all atoms want in their valence shell