Nonmetal elements - PowerPoint PPT Presentation

Elements and compounds

Elements and compounds. Atoms and Elements. Objectives: There are billions of materials in our universe. Those materials are made up from about 100 elements only. Elements: Substances that cannot be broken down further. atom. atom.

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Chapter 1

Chapter 1. Classification of Matter Part 3. Classification of Matter. Classification of Matter. Pure Substances. A pure substance has a fixed composition. Pure substances are either compounds or elements. A pure substance differs from a mixture in the following ways:

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