Which term describes a pure substance formed when two or more elements are chemically combined?

Which term describes a pure substance formed when two or more elements are chemically combined?

• A. Element
• B. Suspension
• C. Compound
• D. Mixture

Answer: (C)

When two or more elements join by chemical bonds to form a new substance with a fixed composition, that new substance is a compound. This means the elements lose their individual identities and create properties different from the elements themselves. For example, water is a compound made from hydrogen and oxygen in a specific ratio, and it behaves very differently from either gas. An element is just a pure substance made of one type of atom, like hydrogen or oxygen. A suspension is a mixture where solid particles are dispersed in a liquid and can settle out over time, not a pure substance. A mixture is simply two or more substances physically kept together without bonding, so their proportions can vary. Since the description specifies a pure substance formed when elements bond chemically, the correct term is compound.

When two or more elements join by chemical bonds to form a new substance with a fixed composition, that new substance is a compound. This means the elements lose their individual identities and create properties different from the elements themselves. For example, water is a compound made from hydrogen and oxygen in a specific ratio, and it behaves very differently from either gas. An element is just a pure substance made of one type of atom, like hydrogen or oxygen. A suspension is a mixture where solid particles are dispersed in a liquid and can settle out over time, not a pure substance. A mixture is simply two or more substances physically kept together without bonding, so their proportions can vary. Since the description specifies a pure substance formed when elements bond chemically, the correct term is compound.