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Es2

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  • 1. Atoms to minerals
  • 2. What is an atom?
    atom: the smallest part of an element that has all the properties of that element
    what are some things that atoms have?
    electrons
    protons
    neutrons
  • 3.
  • 4.
  • 5. Atomic Number
    Atomic number = number of protons in an atom
    Mass number = average number of protons and neutrons in an atom
    Atomic number + # of neutrons = mass number
  • 6. Atomic number
    19
    K
    Potassium
    39.098
    Atomic number = 19 = # of protons
  • 7. 92
    U
    Uranium
    238
  • 8. Isotopes
    Isotopes = same element, different # of neutrons
    Example: carbon
    Carbon : has 6 protons
    Carbon 12: has 6 protons, 6 neutrons
    Carbon 14: has 6 protons, 8 neutrons
  • 9.
  • 10. Compounds
    Compound: a substance that contains two or more elements chemically combined.
    Often have different properties
    Examples: H2O, NaCl
  • 11. Mixtures
    Can be separated physically.
    Example: salt water
    How: evaporation
    Compound =/= mixture!
  • 12. What is a mineral?
    A mineral:
    1. occurs naturally
    2. is a solid
    3. has a definite chemical composition (elements are combined in definite proportions)
    4. its atoms are arranged in a pattern (CRYSTALS)
    5. is inorganic (not formed by plants, animals, or other organisms)
  • 13. Examples of minerals
    gold
    diamond
    quartz
    rock salt (halite)
    Each occurs naturally, is a solid, has a definite chemical composition, is arranged in a pattern, is inorganic
  • 14. a mineral
  • 15.
  • 16. Minerals
    Minerals may be elements or compounds
    Most minerals are compounds
    e.g. quartz = silicon and oxygen
    Most minerals are made up of a few common elements
  • 17.
  • 18. Ionic bonds in minerals

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