Carbonates of alkali and alkaline earth metals differ in:
Stability
Lattice enthalpy
Solubility
All the these
Due to difference in size of cation involved, carbonates of alkali and alkaline earth metals differ in stability, lattice enthalpy and solubility.
Compare the alkali metals and alkaline earth metals with respect to (i) ionization enthalpy (ii) basicity of oxides and (iii) solubility of hydroxides.