Diagonal Relationship of Lithium with Magnesium The main points of similarity : (1) Both have almost similar electronegativities. (2) Both Li and Mg are quite hard. They are harder and lighter than other elements in their respective groups. (3) Both LiOH and Mg(OH)2 are weak bases. (4) Both form ionic nitrides when heated in atmosphere of Nitrogen. 6 Li + N2 → 2 … [Read more...] about Diagonal Relationship of Lithium And Magnesium
Class 11
Anomalous Behaviour Of Lithium
Anomalous behaviour of Lithium is due to 1) very small size of lithium atom and its ions. 2) higher polarising power of Li+ resulting in increased covalent character of its compounds which is responsible for their solubility in organic solvents. 3) comparatively high ionization enthalpy and low electropositive character of lithium as compared to other alkali … [Read more...] about Anomalous Behaviour Of Lithium
Characteristics of Compounds of Alkali Metal
Oxides and hydroxides All the alkali metals ,their oxides, peroxide and superoxide readily dissolve in water to produce corresponding hydroxides which are strong alkalies. 2 Na + 2 H2O -------------> 2 NaOH + H2 Na2O + H2O -------------> 2 NaOH Na2O2 + 2 H2O -------------> 2 NaOH + H2O2 2KO2 + 2 H2O -------------> 2 KOH + H2O2 + O2 Peroxides and … [Read more...] about Characteristics of Compounds of Alkali Metal
Chemical properties of s-block elements
1) All the alkali metals are highly reactive elements since have a strong tendency to lose the single valence s-electron to form unipositive ions having inert gas configuration. 2) This reactivity arises due to their low ionisation enthalpies and high negative values of their standard electrode potential. 3) Due to their strong tendency to lose the single valence electron … [Read more...] about Chemical properties of s-block elements
Physical properties of s-block elements
The group 1 of the periodic table contains 6 elements namely Lithium ,Sodium ,Potassium, rubidium, caesium and francium. They are usually referred to as alkali metals since their oxides and hydroxides are soluble in water and form strong bases or alkalies. Alkali metals are highly reactive and hence do not occur in the free state but are widely distributed in nature in … [Read more...] about Physical properties of s-block elements