Chemical Reactions and Conservation of Mass

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  • Chemical Reactions and Conservation of Mass
    • When elements react, their atoms join with others to form compounds
      • Involves giving, taking or sharing electrons
    • Ionic Bonding
      • Between Metals and Non-metals
      • Metal atoms lose electrons - become positively charged
      • Non-metal atoms gain electrons - become negatively charged
      • Oppositely charged ions are then strongly attracted to each other
        • Held together by ionic bonds
    • Covalent Bonding
      • Between Non-metals - consist of molecules
      • Share electrons
      • Held together by covalent bonds
    • Conservation of Mass
      • Total mass of products = total mass of reactants
      • In a sealed container there is no change in the total mass of the container and its contents


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