Physical Science.

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Physical Science Chapter 2

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Presentation transcript:

Physical Science

Section 2.1 What is Matter? (p. 38) Chapter 2 Matter Section 2.1 What is Matter? (p. 38)

Understand the nature of matter Objectives Understand the nature of matter Differentiate between a pure substance and a mixture

Chemistry- study of compositions, structures, properties, and its changes and interactions I. Composition (chart on p. 39) Matter- anything that has mass and occupies space A. Atoms 1. Element- not made of any other substance- cannot be broken down by chemical means 2. Atom- smallest part of an element that still retains all properties of the element

B. Elements combine chemically to form compounds Molecule- smallest part of a compound that still retains all properties of the compound C. Chemical formula- 2 C6H12O6 Element Coefficient Subscript

II. Pure Substances and Mixtures A. Pure substance- substances with fixed compositions with definite properties Can be an element or a compound B. Mixture- 2 or more substances not chemically combined (sub. keep their individual properties) 1. Classified by how thoroughly they are mixed

a. Heterogeneous mixture- not thoroughly mixed, particles are of different sizes b. Homogeneous- thoroughly mixed, particles of similar size 2. Two or more liquids mixed a. Miscible- will dissolve into each other b. Immiscible- will not dissolve