Chapter 15, Problem 2STP

To determine

To Choose: The correct option.

Answer to Problem 2STP

Option C

Explanation of Solution

Introduction:

A compound is defined as a substance that is composed of atoms of two or more elements held together by chemical bonds in a fixed proportion.

Calcium carbonate $\left({\text{CaCO}}_{\text{3}}\right)$ contains one atom of calcium, one atom of carbon and three atoms of oxygen. So, calcium carbonate $\left({\text{CaCO}}_{\text{3}}\right)$ is an example of compound. Therefore, the option (C) is correct.

An element is defined as substance that contains atoms with identical numbers of proton. Therefore, the option (A) is incorrect.

A mixture is defined as the composition of two or more substances. Therefore, the option (B) is incorrect.

A collide is defined as a heterogeneous mixture in which particles never settle.Therefore, the option (D) is incorrect.

Conclusion:

Thus, the correct option is C.