`BaCO_3,CaCO_3,SrCO_3,MgCO_3` arrange these salts according to their decreasing thermal stability?

Arrange the alkaline earth metal carbonate in the decreasing order of thermal stability .

Caco3

Arrange the elements of period 3 in decreasing metallic character.

Among BECO_(3), CaCO_(3), SrCO_(3) and BaCO_(3) , how many number than of these compounds are thermally more stable than MgCO_(3) ?

Arrange the following structures according to their decreasing number . 1. Hepatic or gastric caeca 2. Malpighian tubules 3. Ommatidia

Arrange the carbanions, (CH_(3))_(3)bar(C),bar(C)Cl_(3),(CH_(3))_(2)bar(C)H,C_(6)H_(5)bar(C)H_(2) , in order of their decreasing stability