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Physical Science: Chapter 5, sec 1

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Notes from Monday, 10/25/10

Notes from Monday, 10/25/10

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Physical Science: Chapter 5, sec 1 Presentation Transcript

  • 1. Chapter 5, Sec 1 Notes from 10/25/10
  • 2. Elements, the Simplest Substances
    • An element is a pure substance that cannot be separated or broken down into simpler substances by physical or chemical means.
    • A pure substance is a substance in which all of the “building-block” particles are identical.
    • For elements, the building-block particles are called atoms.
  • 3. Classifying Elements
    • Each element can be classified by its unique set of characteristic properties.
    • Characteristic properties include physical properties and chemical properties.
    • Each element can be identified by its unique set of properties.
  • 4. Grouping Elements
    • Elements are classified as metals, nonmetals, or metalloids based on their properties.
    • Metals are shiny and conduct heat and electric current. Nonmetals are dull in appearance and do not conduct heat or electric current.
    • Metalloids have properties of both metals and nonmetals.
  • 5.