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Lecture2 - Chapter 2 The Components of Matter CHM 151...

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1 2-1 The Components of Matter Review Chapter 2 CHM 151: Structure of the Atom 2-2 Chapter 2: The Components of Matter 2.8 Compounds: Formulas, Names, and Masses 2.9 Mixtures: Classification and Separation 2.1 Elements, Compounds, and Mixtures: An Atomic Overview* 2.2 The Observations That Led to an Atomic View of Matter* 2.3 Dalton’s Atomic Theory* 2.4 The Observations That Led to the Nuclear Atom Model* 2.5 The Atomic Theory Today* 2.6 Elements: A First Look at the Periodic Table* 2.7 Compounds: Introduction to Bonding* *Review these sections 2-3 Definitions for Components of Matter Element - the simplest type of substance with unique physical and chemical properties. An element consists of only one type of atom. It cannot be broken down into any simpler substances by physical or chemical means. Molecule - a structure that consists of two or more atoms that are chemically bound together and thus behaves as an independent unit. Figure 2.1 2-4 Compound - a substance composed of two or more elements which are chemically combined. Mixture - a group of two or more elements and/or compounds that are physically intermingled. Definitions for Components of Matter Figure 2.1
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