In the classification of matter, table salt is primarily sodium chloride, $NaCl$. How is table salt best classified?

• A. A heterogeneous mixture, because it has visibly different parts
• B. A compound, because it consists of sodium and chlorine chemically bonded in a fixed ratio
• C. An element, because it cannot be broken down into simpler substances
• D. A homogeneous mixture, because it contains variable amounts of sodium and chlorine

Answer: (B)

Verified step by step guidance

1. Recall the basic classifications of matter: elements, compounds, homogeneous mixtures, and heterogeneous mixtures.
2. Understand that an element is a pure substance that cannot be broken down into simpler substances by chemical means.
3. Recognize that a compound is a pure substance composed of two or more elements chemically bonded together in a fixed ratio.
4. Identify that a homogeneous mixture has a uniform composition throughout but consists of physically combined substances, not chemically bonded.
5. Note that a heterogeneous mixture has visibly different parts or phases and is not uniform throughout.