Explain
(i) The basis of similarities and differences between metallic and ionic crystals.
(ii) Ionic solids are hard and brittle.

Explain differences between metallic and ionic crystals .

Explain why ionic solids are hard and brittle .

Explain similarities between metallic and ionic crystals .

Write the difference between ionic bond and covalent bond.

The various types of ionic solids differ in their

Discuss the similarities between alkaline earth metals and gradation in the following aspects: (ii) Hydration enthapies.

Discuss the similarities between alkaline earth metals and gradation in the following aspects: (i) Electronic configuration.

On exposure to air, alkali metals get tarnished due to formation of oxides, hydroxides and carbonates on their surface. When heated in air or oxygen they burn vigorously forming different types of oxides depending upon the nature of the metal. The formation and stability of these metals can be explained on the basis of size of alkali metal ion and the anion. Peroxides are colourless, while superoxides are coloured. The normal oxides are basic while peoxides and superoxides act as oxidising agents Na_(2)O_(2) has light yellow colour. This is due to

On exposure to air, alkali metals get tarnished due to formation of oxides, hydroxides and carbonates on their surface. When heated in air or oxygen they burn vigorously forming different types of oxides depending upon the nature of the metal. The formation and stability of these metals can be explained on the basis of size of alkali metal ion and the anion. Peroxides are colourless, while superoxides are coloured. The normal oxides are basic while peoxides and superoxides act as oxidising agents On heating in excess of oxygen, lithium gives

Consider an ionic solid that dissolves in water according to the equation: M_(n)X_(m(s)) nM_(aq)^(m+)n + mX_(aq)^(n-) . The equilibrium constant for this reaction, K _(sp)=[M^(m+)]^(n) [X^(n-)]^(m) is known as the solubility product of M_(n), X_(m) . The form of this euquilibrium is important in understanding effects such as the influence of pH, complex fomation and common ion cffect. Equilibrium constant in solution should be written correctly using activities and not concentrations. The difference between thesc quantities is large in concentrated ionic solutions and K_(sp) is quantitatively reliable as a guide of solubilities only for very dilute solutions, If solubility product of AB type salt is 4xx 10^(-10) at 18^(@) C, and M.W of AB is 143.5 g/mol. The solubility in g/lit of AB is