chemical formulas 1 yr 10 mock

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  • Created by: tia5303
  • Created on: 15-07-20 14:03
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  • chemical formulas
    • common ions
      • positive ions (1+ ions)
        • lithium, Li
        • sodium, Na
        • potassium, K
      • positive ions (2+ ions)
        • magnesium, Mg
        • calcium, Ca
      • negative ions (2- ions)
        • carbonate, CO
        • sulfate, SO
        • oxide, O
        • sulfide, S
      • negative ions (1- ions)
        • hydroxide, OH
        • nitrate, NO
        • fluoride, F
        • chloride, Cl
        • bromide, B
        • iodide, I
      • any of the positive ions can combine with any of the negative ions to form an ionic compound
        • for example, Na and Cl form NaCl, where sodium becomes a positive ion and chlorine becomes a negative ion
    • you can work out the formula of an ionic compound
      • ionic compounds are made of a positive charged part and a negatively charged par
      • the overall charge of any compound is 0. so all the negative charges in the compound must balance all the positive charges.
      • you can use the charges on the individual ions present to work out the formula for the ionic compound.
        • you need to be able to write formulas using chemical symbols.
          • (example on flashcard)
    • formulas of molecules
      • prefixes tell you how many of a certain atom are in a molecule.
        • the main ones
          • mono- = one
          • di- = two
            • e.g each molecule of carbon monoxide contains one oxygen atom and each molecule of carbon dioxide contains two oxygen atoms.
          • tri- = three
      • common molecules
        • water = H  O
        • ammonia = NH
        • carbon dioxide = CO
        • hydrogen = H
        • Chlorine = Cl
        • oxygen = O

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