Some Important Fact of Periodic Table
- Lightest elements – H
- Strongest oxidising elements – F
- Strongest reducing elements – Fr
- Element of which have no core electron – H and He
- Elements which is stored in water – Whit phosphorous
- Elements which are stored in kerosene oil – Na
- Least electropositive or most electronegative elements – F
- Least electroneagative – Fr
- Elements of highest electron affinity – Cl
- Elements of lowest electrone affinity – Fr
- Elements of highest covalency – Ru & Os [RuO4, OsO4]
- Elements of highest ionization potential – He
- Elements of lowest ionization potential – Fr
- Elements of largest radius – Cs
- Elements of smallest radius – H
- The rarest elements of the earth crust – At
- Abundant element of the earth crust – O2 [46.6%]
- The second and third abundant elements of the earth crust – Si and Al respectively
- Transuranic elements – Np, Pu, Am, Cm, Bk, Cf, Es, Fm, Md, No, Lr, Rf, Ha etc. [i.e., Z>92]. (all ratio active & synthetic)
- Lightest metal – Li
- Heaviest metal – Os
- Most malleable metal – Au
- Metal which is bst conductor of heat and electricity – Ag
- Most reactive metal – Fr
- Noble metal – Ru, Rh, Pd, Os, Ir, Pt and Au
- Metal which shows highest valency of 9 – Pu
- Metal used in over head electric wire – Al
- Most reactive non-metal – F
- Liquid metals – Fr, Hg, Ga
- Amphoteric metals – Zn, Al, Sn, Pb, As, Cr and Po
- Coinage Metals – Cu, Ag, Au
- Volatile metals – Zn, Cd, Hg
- Metal Having highest M.P. and B.P. – W
- Non-metal which is best conductor of electricity – Graphite
- The only liquid non-metal – Br
- Non-metal having highest M.P. and B.P. – Diamond
- Heaviest solid non-metal – At
- Non-metal having metallic lusture – Graphite and Diamond
- Metalloids – B. Si, Ge, As, Sb, Te, Po and At
- Semi-conductor – Ge
- Hardest substance – Diamond
- Most abundant gas in the atmosphere – N2 (79%)
- Oldest known inert gas – Ar
- Latest known inerst gas – Rn (Not present in air)
- Oldest known halogen – Cl
- Latest known halogen – At
- Monoatomic gases – He, Ne, Ar, Kr, Xe, Rn
- Diatomic gases – H2, F2, Cl2, Br2, I2, O2, N2
- Tri atomic gases – O3
- Basic gas – NH3
- Neutral gases – N2O, CO
- Brown gas – NO
- Greenish yellow gas – Cl2
- Laughing gas – N2O
- Quick or liquid silver – Hg
- White gold – Pt
- Mosaic of gold – SnS2
- Rolled gold – Alloy of Cu and Al
- Gold fulominate – H2N – Au = NH
- Purple of cassius – Au+ Sn(OH)2
- Largest cation – Cs+ (stable)
- Smallest cation – H+
- Largest anion – At–
- Smallest anion – F–
- Most ductile metal – Pt
- Element subllime of heating – I2
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