Periodic table

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Across
  1. 4. Last metal in group 2
  2. 11. Most reactive alkali metal
  3. 12. Element with 6 protons
  4. 15. Transition metal which rusts
  5. 16. Non-metal with 6 electrons
  6. 19. Element named after a famous Albert with crazy hair!
  7. 20. Gaseous element, makes up 21% of the air around us
  8. 22. Metal with symbol Sn
  9. 23. Metal with 13 electrons and 14 protons
  10. 24. The first alkali metal
  11. 25. The first transition metal
  12. 27. Precious metal with 47 protons
  13. 28. Gas with the symbol He
Down
  1. 1. Number 36
  2. 2. Noble gas in the second period
  3. 3. Poisonous element with 33 electrons
  4. 5. The first element in the periodic table
  5. 6. Metal found in bones and teeth
  6. 7. Found between Technetium and Rhodium in the transition metals
  7. 8. Smelly element with 16 protons
  8. 9. Element with atomic number 35
  9. 10. Element named after the USA
  10. 13. Group 2, period 3
  11. 14. Alkali metal
  12. 16. Metal that is very conductive and used for electrical wiring
  13. 17. First element in group 3
  14. 18. Unreactive gas with 18 protons
  15. 21. Metal with chemical symbol W
  16. 26. Number 53 in the periodic table
  17. 29. Element whose latin name is plumbum, with symbol Pb