Solution:

The electropositive person increments while dropping down in the gathering of soluble base metal which brings about an increment in solidness of antacid carbonates. For the most part, lithium carbonate isn’t steady when it responds to warm on the grounds that lithium carbonate is covalent. Because of the more modest size of lithium particle it spellbinds enormous carbonate particle which brings about the development of stable lithium oxide.

This is the reason sodium carbonate breaks down at high temperature and lithium carbonate disintegrates at low temperature.