Classify each of the following as a pure substance or a mixture. If a mixture, indicate whether it is homogeneous or heterogeneous: c. magnesium

Key Concepts

Pure Substances

A pure substance consists of a single type of particle and has a uniform composition throughout. Examples include elements like magnesium and compounds like water. Pure substances have distinct physical and chemical properties that do not change regardless of the sample size.

Mixtures

A mixture contains two or more different substances that are physically combined but not chemically bonded. Mixtures can be classified as homogeneous, where the components are evenly distributed (like saltwater), or heterogeneous, where the components remain distinct (like a salad).

Classification of Matter

The classification of matter involves distinguishing between pure substances and mixtures based on their composition and properties. Understanding this classification helps in identifying materials and predicting their behavior in chemical reactions, which is essential in chemistry.