Elements of the Periodic Table

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Across
  1. 1. was first produced by bombarding bismuth with alpha particles
  2. 5. a toxic, irritant, pale green gas
  3. 8. a non-metallic solid
  4. 10. a brittle reddish-tinged grey metal
  5. 13. a soft silver-white reactive metal
  6. 17. used to make electric light filaments
  7. 18. a light silvery-grey metal
  8. 20. the life-supporting component of the air
  9. 21. a precious silvery-white metal
  10. 24. a soft grey metal
  11. 25. the element with the symbol Fe
  12. 26. a colourless, odourless, highly flammable gas
  13. 28. a colourless, odourless unreactive gas that forms about 78 per cent of the earth's atmosphere
  14. 29. a poisonous, combustible non-metal which exists in two common allotropic forms
  15. 30. a non-metal with semiconducting properties
  16. 32. the lightest of the alkali metals
Down
  1. 2. used in fluorescent lamps and illuminated advertising signs
  2. 3. a non-metal which has two main forms (diamond and graphite)
  3. 4. the chemical element of atomic number 21
  4. 6. a soft, heavy, ductile bluish-grey metal
  5. 7. a brittle steel-grey metalloid
  6. 9. a hard white metal used in stainless steel and other alloys
  7. 11. the chemical element of atomic number 9
  8. 12. used in strong, light, corrosion-resistant alloys
  9. 14. the chemical element of atomic number 96
  10. 15. used in some specialized electric lamps
  11. 16. occurs naturally as a decay product in uranium and thorium ores
  12. 19. also called quicksilver
  13. 22. the chemical element of atomic number 12
  14. 23. a hard grey metal of the transition series
  15. 27. the element with the symbol K
  16. 31. a yellow precious metal