Mass and matter are related, atoms differ from compounds, physical and chemical properties have distinctions, and mixtures vary in composition.
Mass is the amount of matter in an object, while matter refers to anything that occupies space and has mass. An atom is the smallest unit of matter that retains the properties of an element, whereas a compound is a substance composed of two or more different elements chemically bonded. Physical properties describe how a substance looks, feels, or behaves, while chemical properties describe how a substance interacts with other substances. A homogeneous mixture has uniform composition throughout, like air, and a heterogeneous mixture has visibly different substances, like a salad.
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