Chpt1 - Chapter 1 Introduction: Matter and Measurement...

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Chapter 1 Introduction: Matter and Measurement
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Chemistry: The study of matter and the changes it undergoes. or The science that seeks to understand the properties and behavior of matter by studying the properties and behavior of atoms and molecules.
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Matter: Anything that has mass and takes up space.
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Matter Atoms are the building blocks of matter. Each element is made of the same kind of atom. A compound is made of two or more different kinds of elements.
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States of Matter No Fixed volume or shape. Easily compressed. Expands to fill its container Fixed volume but not fixed shape. Assumes shape of container it occupies. Not easily compressed. Fixed volume and fixed shape. Not easily compressed.
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Classification of Matter Elements: Cannot be decomposed into simpler substances. Each element is composed of only one kind of atom. Compounds: Are composed of two or more elements. Properties are distinct and not related to the properties of the elements they are composed of. (e.g. NaCl, water)
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Classification of Matter Pure substance (or simply substance ): Can be either an element or a compound. Composition does not vary from sample to sample. Mixture : Combination of different substances. Each substance retains its properties.
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Classification of Matter Homogeneous Mixtures (solutions) : Mixtures that are uniform throughout. Samples of the same mixture do not vary in composition. Heterogeneous Mixtures : Do not have the same composition, appearance, or properties throughout. Samples of the same mixture will vary in composition.
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Classification of Matter Classify: Sand (SiO 2 ), salt water, Chex mix
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Properties of Matter Physical Properties: Can be observed without changing a substance into another substance. Boiling point, density, mass, volume, etc.
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This note was uploaded on 04/25/2008 for the course CHEM 131 taught by Professor Sykora during the Spring '08 term at S. Alabama.

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Chpt1 - Chapter 1 Introduction: Matter and Measurement...

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