Some Important Fact of Periodic Table

  1. Lightest elements – H
  2. Strongest oxidising elements – F
  3. Strongest reducing elements – Fr
  4. Element of which have no core electron – H and He
  5. Elements which is stored in water – Whit phosphorous
  6. Elements which are stored in kerosene oil – Na
  7. Least electropositive or most electronegative elements – F
  8. Least electroneagative – Fr
  9. Elements of highest electron affinity – Cl
  10. Elements of lowest electrone affinity – Fr
  11. Elements of highest covalency – Ru & Os
    [RuO4, OsO4]
  12. Elements of highest ionization potential – He
  13. Elements of lowest ionization potential – Fr
  14. Elements of largest radius – Cs
  15. Elements of smallest radius – H
  16. The rarest elements of the earth crust – At
  17. Abundant element of the earth crust – O2 [46.6%]
  18. The second and third abundant elements of the earth crust – Si and Al respectively
  19. Transuranic elements – Np, Pu, Am, Cm, Bk, Cf, Es, Fm, Md, No, Lr, Rf, Ha etc. [i.e., Z>92]. (all ratio active & synthetic)
  20. Lightest metal – Li
  21. Heaviest metal – Os
  22. Most malleable metal – Au
  23. Metal which is bst conductor of heat and electricity – Ag
  24. Most reactive metal – Fr
  25. Noble metal – Ru, Rh, Pd, Os, Ir, Pt and Au
  26. Metal which shows highest valency of 9 – Pu
  27. Metal used in over head electric wire – Al
  28. Most reactive non-metal – F
  29. Liquid metals – Fr, Hg, Ga
  30. Amphoteric metals – Zn, Al, Sn, Pb, As, Cr and Po
  31. Coinage Metals – Cu, Ag, Au
  32. Volatile metals – Zn, Cd, Hg
  33. Metal Having highest M.P. and B.P. – W
  34. Non-metal which is best conductor of electricity – Graphite
  35. The only liquid non-metal – Br
  36. Non-metal having highest M.P. and B.P. – Diamond
  37. Heaviest solid non-metal – At
  38. Non-metal having metallic lusture – Graphite and Diamond
  39. Metalloids – B. Si, Ge, As, Sb, Te, Po and At
  40. Semi-conductor – Ge
  41. Hardest substance – Diamond
  42. Most abundant gas in the atmosphere – N2 (79%)
  43. Oldest known inert gas – Ar
  44. Latest known inerst gas – Rn (Not present in air)
  45. Oldest known halogen – Cl
  46. Latest known halogen – At
  47. Monoatomic gases – He, Ne, Ar, Kr, Xe, Rn
  48. Diatomic gases – H2, F2, Cl2, Br2, I2, O2, N2
  49. Tri atomic gases – O3
  50. Basic gas – NH3
  51. Neutral gases – N2O, CO
  52. Brown gas – NO
  53. Greenish yellow gas – Cl2
  54. Laughing gas – N2O
  55. Quick or liquid silver – Hg
  56. White gold – Pt
  57. Mosaic of gold – SnS2
  58. Rolled gold – Alloy of Cu and Al
  59. Gold fulominate – H2N – Au = NH
  60. Purple of cassius – Au+ Sn(OH)2
  61. Largest cation – Cs+ (stable)
  62. Smallest cation – H+
  63. Largest anion – At–
  64. Smallest anion – F–
  65. Most ductile metal – Pt
  66. Element subllime of heating – I2

 

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