Metric - Chemistry 50 Dr. Cinzia Muzzi Chapters 2 and 3...

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Chemistry 50 Dr. Cinzia Muzzi Chapters 2 and 3 Note: This information is meant to enhance your own class notes and to be used as a quick reference when studying. This is not a complete lecture outline. You must still take notes in class to understand all of the material presented. I. Some Basic Terminology chemistry : the study of the composition, structure, properties and behavior of matter. matter: the physical material of the universe; atoms and molecules make up all matter. (Anything that has mass and takes up space). (This is a “for now” definition. We will refine this definition in future discussions). atoms: the smallest distinct units in a sample of matter; “building blocks” of matter. (This is a “for now” definition. We will refine this definition in future discussions). molecules: larger units of matter that consist of two or more atoms. II. Matter Can Be Divided into Two Categories A. Substances substance: matter that has a fixed composition and distinct properties. element: substances composed of only one type of atom. compound: substance made of two or more elements in a fixed ratio. B. Mixtures mixtures: a combination of two or more substances where each substance retains its own chemical identity. homogeneous: a mixture that has the same composition through out. heterogeneous: varies in composition (and/or properties) from one part of the mixture to another. physical property: a characteristic displayed by a sample of matter without changing composition. physical change: when a sample of matter undergoes a change in property, but the identity of matter does not change.
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Chemistry 50 Dr. Cinzia Muzzi III. Metric System Mass Many small units make up a large unit
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Metric - Chemistry 50 Dr. Cinzia Muzzi Chapters 2 and 3...

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