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Elements, compounds and mixtures ii
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Elements, compounds and mixtures ii

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Transcript

  • 1. Elements, Compounds and Mixtures Compounds and Mixtures
  • 2. Objectives
    • Define compounds as substances consisting of two or more chemically combined elements
    • Define mixtures as two or more elements and/or compounds that are not chemically combined
    • Lists examples of compounds and mixtures.
    • Compare characteristics of mixtures and compounds.
  • 3. Compounds and Mixtures
  • 4. Compounds and Mixtures How do elements join up together to form matter?
    • Matter are either made up of
    • purely elements
    • compounds of elements
    • mixtures of elements and/or compounds
  • 5. Compounds and Mixtures
    • Compounds
    • Consists of two or more elements that are chemically combined together.
    • Examples of Compounds
    • Salt Sugar
    • Carbon dioxide Water
  • 6. Compounds and Mixtures
    • Pictorial Diagram of Compounds
    Element A Element B
  • 7. Compounds and Mixtures
    • Mixtures
    • Consists of two or more elements and/or compounds that are NOT chemically combined together.
    • Examples of Mixtures
    • Air Bronze Carbonated drinks
  • 8. Compounds and Mixtures
    • Pictorial Diagram of Mixtures
    Element A Element B Mixture of 2 elements
  • 9. Compounds and Mixtures
    • Pictorial Diagram of Mixtures
    Element A Element B Element C Mixture of 2 compounds
  • 10. Compounds and Mixtures
    • Pictorial Diagram of Mixtures
    Element A Element B Element C Mixture of 2 compounds and 1 element
  • 11. Compounds and Mixtures
    • Characteristics of Compounds and Mixtures
    Formed without chemical reactions Similar characteristics from constituents Can be broken up into constituents by physical means Cannot be broken up into constituents by physical means Different characteristics from constituents Formed with chemical reactions Mixtures Compounds
  • 12. Compounds and Mixtures
    • Question
    • Water is made up of hydrogen and oxygen. Why is it a compound?
  • 13. Compounds and Mixtures
    • Question
    • Water is made up of hydrogen and oxygen. Why is it a compound?
    Hydrogen and oxygen are gases, water is a liquid. Hydrogen and oxygen can burn, water cannot. Since water have different characteristics compared to its constituents, and can only be split up by passing electricity through it. Water is a compound.
  • 14. Compounds and Mixtures
    • Question
    • Mixture or compound?
    Mixture of 1 compound and 1 element
  • 15. Compounds and Mixtures
    • Question
    • Mixture or compound?
    Mixture of 1 compound and 2 elements
  • 16. Compounds and Mixtures
    • Question
    • Mixture or compound?
    Neither, pure element
  • 17. Compounds and Mixtures
    • Question
    • Mixture or compound?
    Pure element.
  • 18. Conclusion
    • Matter are made up of either purely elements, compounds or mixtures
    • Characteristics of compounds are different from their constituents
    • Mixtures retain some characteristics of their constituents

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