anamolous behaviour of lithium
Answers
Anomalous behaviour of lithium with respect to other alkali metals: The melting point and boiling point of lithium are higher that than other alkali metals. The hardness of lithium is higher than other metals. Lithium nitrate decomposes to form an oxide whereas other metals on heating give nitrites.
Answer:
Anomalous behaviour of lithium with respect to other alkali metals: The melting point and boiling point of lithium are higher that than other alkali metals. The hardness of lithium is higher than other metals. Lithium nitrate decomposes to form an oxide whereas other metals on heating give nitrites.
Lithium shows anomalous behavior due to its small size. The polarizing power of lithium ion is highest of all the alkali metal ion . Because of small size, Lithium is very hard, less reactive as compare to other alkali metals like sodium and potassium.
Explanation:
Similarities between Lithium and Magnesium:
Lithium and magnesium both form monoxides.
2Mg + O2 → 2MgO
They both react with nitrogen to form their nitrides respectively.
Li(s) + N2(g) → 2Li3N(s)
They both react slowly with water. They form oxides and hydroxides which decompose on heating.
Mg(s) + 2H2O(g) → Mg(OH)2(aq) + H2(g)
Oxides of both the elements do not form super oxides.
The carbonates of both decompose on heating to form the oxides and carbon-dioxide.
2 Mg(s) + CO2 → 2MgO(s) + C(s)
Lithium chloride (LiCl) and magnesium chloride (MgCl2) are both soluble in ethanol.
Both the elements are less stable towards heat.