Periodic Table - Test your Skills!

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Across
  1. 2. I am a noble gas with 2 electrons
  2. 4. It is a well known radioactive element used in atomic power plant
  3. 5. I am kept immersed in kerosene as I am very reactive
  4. 10. First column metals are known as _____ metals
  5. 11. I am the first element in the fourth period used in making fertilizer
  6. 13. Group 18 elements are known as _____ gases
  7. 16. Second column metals are known as _____ metals
  8. 18. My atomic number is 79
  9. 19. I am non metal but conduct electricity!
  10. 20. These elements forms staircase pattern in periodic table
  11. 23. The total number of rows in modern periodic table
  12. 24. They are uncharged particles inside a nucleus but has mass
  13. 25. I am a metal that is liquid at room temperature
  14. 28. He was the first one to give the present structure of modern periodic table
  15. 29. I am a light weight metal
  16. 31. They are negatively charged subatomic particles inside an atom
  17. 32. I am a form of carbon, girls love me! :)
  18. 34. I am a gas with 8 protons and 8 neutrons
  19. 35. I am not really an alkali metal, but since I have only 1 electron I behave like them
  20. 36. My atomic number is 47 and I am used to make photographic film
  21. 38. He gave the law of octaves
Down
  1. 1. Horizontal rows are known as _____
  2. 3. I am a metal with 28 electrons
  3. 6. _____ relationship is found in Li-Mg, Be-Al, B-Si, etc.
  4. 7. He was the first one to classify certain elements into groups called triads
  5. 8. Vertical columns are known as _____
  6. 9. I am found in your bones and teeth
  7. 12. I am a transition metal with 25 electrons
  8. 14. Group 17 elements are known as _____
  9. 15. You can find me in the carbon family in the fifth period
  10. 17. Elements of group 3-12 are known as _____ elements
  11. 21. Elements 57-71 forms _____ series
  12. 22. I am the longest period in the periodic table
  13. 26. I am used to make mobile covers
  14. 27. I am another name of group which contains noble gases
  15. 29. Elements 89-103 forms _____ series
  16. 30. They are positively charged subatomic particles inside a nucleus
  17. 33. I created the Modern Periodic Table
  18. 37. I have 26 protons. Who am I?