Table

Facts to Remember

Facts to Remember
Most reactive solid element Li
Most reactive liquid element Cs
Most reactive gaseous element F
Highest electronegativity F
Highest ionization potential H
Lowest electron affinity Noble gases (zero)
Liquid element of radioactive nature Francium (Fr)
Total number of radioactive elements in periodc table 25
Volatile d-block elements Zn, Cd, Hg
Element containing no neutron 1H1 (Protium)
Most abundant element of earth Oxygen (O)
Rarest element of earth Astatine (At)
Most abundant metal of earth Fe
Most abundant metal of earth crust Al
Element having maximum tendency for catenation and allotropes Carbon
Lightest element H
Heaviest naturally occurring element U238
Poorest conductor of current Pb (metal), S (non-metal)
Amphoteric non-metal Si
Elements showing diagonal relationship Li-Mg, Be-Al; B-Si
Metalloids elements B, Si, Ge, As, Sb, Te
Non-metals having metallic lusture Graphite, lodine
Element that sublime on heating Iodine
Noble metals Au, Pt
Amphoteric metals Zn, Al, Sn, Pb
Non-metal having highest m.pt, b.pt Diamond
Metals showing highest ox. No. Pu, Os
Element having highest tensile strength Boron
Coolant in nuclear reactors D2O (Heavy water)
Latest discovered element Hahnium (Ha, atomic no. 105) Eka (Eka mercury atomic no. 112)
Element kept in water P (yellow)
Elements kept in kerosene Na, K, Cs
Dry ice of Cardice CO2(Solidified)
Artificial explosive Dynamite
First noble prize of chemistry was given to Vant Hoff
Tincture iodine (antiseptic) I2in alcohol
Some commonly used oxidants H2O2. SO2, SO3, Cl2, H2SO4. HNO3
Some commonly used SO2,H2S, Cl2
Reductants Bleaching powder
Neutral oxides of non-metals Co, N2O, NO, H2O
Dry bleacher O3
Natural explosive NCl3
Amphoteric oxides ZnO, PbO, Al2O3, SnO, BeO
Some polymorphic elements O, S, P
Some isomorphous substances FeSO4. 7H2O, MgSO4.7H2O, ZnSO2.7H2O, Na2S2O3.7H2O, FeSO4.7H2O
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