im not ssure but its formed by the oyster being irritated my a peic of sand so it forms a protective layer around t and the layers keep building upon each other. hope this helps=P
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A pear is a compound since it is made up of different chemical elements bonded together to form molecules.
diamonds, gold, silver, copper, platinum are elements.
some jewels are compounds.
Aluminum is an element. It is a pure substance made up of only one type of atom.
Calcium is an element. It is a pure substance made up of only one type of atom. It is not a compound, homogeneous mixture, or heterogeneous mixture.
Silver ore is a heterogeneous mixture, as it contains various minerals and impurities along with the silver.
Mouthwash is typically a homogeneous mixture. This means that the components are evenly distributed throughout the solution and the mixture has a uniform composition.
A heterogeneous compound is an incorrect description. Compounds are homogeneous substances made of two or more elements that are chemically combined in fixed ratios.