Elements Compounds and Mixtures PPT SM

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Elements Compounds and Mixtures PPT SM

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  1. Elements, Compounds,and Mixtures

    Slide 1 - Elements, Compounds,and Mixtures

  2. Pure Substances

    Slide 2 - Pure Substances

    • A sample of matter that has definite chemical and physical properties.
    • Atoms
    • Elements
    • Molecules
    • Compounds
  3. Elements

    Slide 3 - Elements

    • Elements are the simplest pure substance.
    • Elements cannot be separated into simpler substance by physical or chemical means.
    • 3
  4. Elements

    Slide 4 - Elements

    • There are one hundred and eighteen known elements in the universe listed on the periodic table of elements.
    • Everything in the world is made up of a combination of these elements.
    • 4
  5. Elements

    Slide 5 - Elements

    • The smallest particle of an element that has the properties of that element is called an atom.
    • An atom is the basic building block of matter.
    • 5
  6. Elements

    Slide 6 - Elements

    • All elements are made of atoms.
    • Atoms of the same element are alike.
    • Atoms of different elements are different.
  7. Elements

    Slide 7 - Elements

    • Gold atoms are all alike
    • A piece of gold is made up of many gold atoms
    • If you broke a gold atom down, you would no longer have gold, but electrons, protons, and neutrons
    • For example:
  8. Elements

    Slide 8 - Elements

    • Helium atoms are all alike
    • A balloon full of helium is made up of many helium atoms
    • If you broke a helium atom down, you would no longer have helium, but electrons, protons, and neutrons
  9. Elements

    Slide 9 - Elements

    • Helium atoms are all alike
    • Gold atoms are all alike
    • Helium and Gold atoms are different
  10. Elements

    Slide 10 - Elements

    • The Swedish scientist J.J. Berzelius proposed in 1813 that chemical symbols be based on their Latin names of the elements.
  11. Elements

    Slide 11 - Elements

    • Each symbol consists of one or two letters.
    • Two letters are needed for a chemical symbol when the first letter of that element’s name has already been used.
    • 11
  12. Common Elements

    Slide 12 - Common Elements

    • Aluminum
    • Al
    • Bromine
    • Br
    • Calcium
    • Ca
    • Carbon
    • C
    • Gold
    • Au
    • Helium
    • He
    • Hydrogen
    • H
    • Nitrogen
    • N
  13. Compound

    Slide 13 - Compound

    • Pure substance composed of two or more different elements joined by chemical bonds.
  14. Compound

    Slide 14 - Compound

    • Made of elements in a specific ratio
    • that is always the same (2Hydrogen, 1 Oxygen)
    • Has a chemical formula
    • Can only be separated by chemical means, not physically
    • H2O
    • NaCl
  15. Two or more substances that are not chemically combined with each other and can be separated by physical means.

    Slide 15 - Two or more substances that are not chemically combined with each other and can be separated by physical means.

    • The substances in a mixture keep their individual properties.
    • Solutions – a special kind of mixture where one substance dissolves in another.
    • 15
    • Mixtures
  16. An element contains just one type of atom.

    Slide 16 - An element contains just one type of atom.

    • A compound contains two or more different atoms joined together.
    • A mixture contains two or more different substances that are only physically joined together, not chemically- they can be separated
    • A mixture can contain both elements and compounds.
    • 16
    • Review
  17. 17

    Slide 17 - 17

    • Is it an element, compound, or mixture?
    • Rocks
  18. 18

    Slide 18 - 18

    • Is it an element, compound, or mixture?
    • Rocks
  19. 19

    Slide 19 - 19

    • Is it an element, compound, or mixture?
    • Copper
  20. 20

    Slide 20 - 20

    • Is it an element, compound, or mixture?
    • Copper
  21. 21

    Slide 21 - 21

    • Is it an element, compound, or mixture?
    • Skittles
  22. 22

    Slide 22 - 22

    • Is it an element, compound, or mixture?
    • Skittles
  23. 23

    Slide 23 - 23

    • Is it an element, compound, or mixture?
    • Salt
  24. 24

    Slide 24 - 24

    • Is it an element, compound, or mixture?
    • Salt
  25. 25

    Slide 25 - 25

    • Is it an element, compound, or mixture?
    • (Bring your answers to your next class)
    • Diamond
    • Tea
    • Sugar
    • Neon
    • Salad
    • Water
    • Aluminum
    • Lemonade