Periodicity

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Across
  1. 1. Has a melting point of 84 K
  2. 4. Discovered the Nobel gases single handedly !
  3. 5. The Russian
  4. 7. The electrons in metals
  5. 9. s for ....................
  6. 10. Lanthanides & Actinides Block
  7. 12. The most common type of element
  8. 13. The state required for ionisation
  9. 15. Highest melting point in period 3
  10. 17. [Ne] 3s2 3p3
  11. 19. The most commmonly measure type of radius
Down
  1. 2. These tend to be more electronegative than the other elements
  2. 3. Block containing the staircase
  3. 6. Groups 1 - 4 tend to have these structures
  4. 8. d for .....................
  5. 11. Contract across a period
  6. 12. Carbon forms these
  7. 14. Separating metals from non-metals
  8. 16. Columns
  9. 18. Another word for period