File:Calcium carbonate structure.svg

DescriptionCalcium carbonate structure.svg English: Calcium carbonate is a chemical compound with the formula CaCO3. It is a common substance found in

DescriptionCalcium carbonate.png English: Chemical structure of calcium carbonate Date 4 December 2009, 21:13 (UTC) Source Own work Author Edgar181 (talk)

(represented as O2 ). The table below gives some common compounds. Compound Calcium carbonate Carbon dioxide Copper sulfate Glucose Hydrochloric acid Sodium bicarbonate

with different proteins to form the structure found in other creatures. Chitin is combined with calcium carbonate when it is within crustacean shells