Periodic Table (2)

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Across
  1. 2. halogens form ___ molecules
  2. 5. a more reactive halogen ___ a less reactive one from its salt solution
  3. 7. as the Group is descended, shielding effect from the inner shells increases, hence attractive force for electrons ___
  4. 8. transition metals have high ___
  5. 14. transition metals form ions with ___ oxidation states
  6. 16. transition metals form ___ compounds
  7. 17. the halogen that attracts electrons least readily
  8. 18. noble gas atoms have ___ outermost electron shells, hence are stable
  9. 19. Group VII elements are known as ___
  10. 20. exists as dark purple solid which undergoes sublimation
Down
  1. 1. transition metals have ___ melting and boiling points
  2. 3. as molecular size ___ down the Group, intermolecular forces of attraction becomes stronger, hence melting point _____
  3. 4. the halogen with the strongest oxidising power
  4. 5. Down the Group, the colour of the halogens ___
  5. 6. the colour of chlorine gas
  6. 9. As the Group is descended, the melting and boiling points of halogens increase
  7. 10. gases in Group 0 exist as ___ particles
  8. 11. halogens form halide ions with a ___ negative charge
  9. 12. a reddish-brown liquid
  10. 13. noble gases are unreactive or ___
  11. 15. the colour of iodine dissolved in water