Lithium carbonate is not so stable to heat as the other alkali metal carbonates. Explain.

Explanation

Lithium carbonates is not so stable to heat because Lithium has very small size and it polarises the large `CO_3^(2-)` ion which leads to the formation of more stable `Li_2O and CO_2`
As the electro positive character increases down the group, the stability of carbonats increase.