Sime Important fact about elements of periodic table.

1. Lowest electronegativity : Cs
2. Highest electronegativity : F
3. Highest ionisation potential : He
4. Lowest ionisation potential : Cs
5. Lowest electron affinity : Noble gases
6. Highest electronaffinity : Chlorine
7. Least electropositive element : F
8. Lowestm. pt.metal : Hg
9. Highestm. pt. and b. pt.metal : W(Tungsten)
10. Lowestm. pt. and b. pt. nonmetal : He
11. Notorious element : Hydrogen
12. Lightest element : Hydrogen
13. Smallest atomic size : H
14. Largest atomic size : Cs
15. Largest anionic size : I–
16. Smallest cation : H+
17. Most electropositive element : Cs
18. Elementwithelectronegativity
next toFluorine : Oxygen
19. Groupcontainingmaximumno.
of gaseous elements in periodic table : Zero group
20. Total number of gaseous elements
in periodic table : 11 (H, N, O, F, Cl, He, Ne,Ar, Kr, Xe, Rn)
21. Total number of liquid elements in
periodic table : 6 (Ga, Br, Cs, Hg, Fr, Uub)
22. Smallest anion : F–
23. Liquid element of radioactive nature : Fr
24. Total number of radioactive elements in
periodic table : 25
25. Volatile d-block elements : Zn, Cd, Hg,Uub
26. Element containingno neutron : H
27. Most abundant element on earth : Oxygen
28. Rarest element on earth : At (astatine)
29. Most abundantmetal on earth : Al
30. Elementhavingmaximumtendency
for catenation
31. Nonmetal having highestm. pt., b. pt. : Carbon (diamond)
32. Metals showing highest oxidation number : Os (+8)
33. Most electrovalent compound : CsF
34. Most stable carbonate : Cs2CO3
35. Strongest alkali : CsOH
36. Strongest basic oxide : Cs2O
37. Best electricity conductor amongmetals : Ag
38. Best electricity conductor among nonmetals : graphite
39. Most poisonous element : Pu(Plutonium)
40. Liquid nonmetals : Br
41. Element kept inwater : Phosphorous
42. Elements kept in kerosene : IAgroup element (exceptLi)
43. Elements sublimeonheating : I2
44. Noblemetals : Au, Pt. etc.
45. Amphotericmetal : Be, Zn,Al, Sn, Pb
46. Amphoteric nonmetal : Si
47. Metalloids elements : B, Si,As, Te,At, Ge, Sb
48. Nonmetals havingmetallic lusture : Graphite, Iodine
49. Heaviest naturally occuringelement : Uranium
50. Poorest conductor of electricity : Diamond
51. Hardest naturally occuring element : Diamond
52. Lightest solidmetal : Li
53. Amphoteric oxides : BeO, Al2O3, ZnO, PbO, PbO2, SnO, SnO2,
Sb2O3, As2O3 etc.
54. Neutral oxides of nonmetals : NO, CO, H2O, N2O
55. Dry bleacher : H2O2
56. Dry ice : Solid CO2
57. Firstmanmade element : Tc43 (Technicium)
58. Smallest period : Ist (2 elements)
59. Largest period in periodic table : 6th (32 elements)
60. Largest group in periodic table : IIIB(32 elements)
61. Most abundant d-blockmetal : Fe
62. Most abundant s-blockmetal : Ca
63. Highest density (Metals) : Os, Ir
64. Highest density (NonMetals) : Boron
65. Most abundant gas in atmosphere : Nitrogen
66. Most abundant element in the universe : Hydrogen