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Chemical Reactions

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  • Is this a chemical reaction? Why or why not?
    Yes, atoms from the starting substances are the same kind and same amount as substance 1 and 2 but in different groups
  • What does it mean ff two substances mix together and the two substances found afterwards have the same properties?
    There was not a chemical reaction and no new substances were formed
  • Why do scientists use models?
    To help us understand something by making it simpler or easier to see (real items are too big or too small to see)
  • Will Sample 1 and 2 have the same properties? Why or why not?
    No, sample 2 has one less atom in each group of atoms
  • What is the difference between atoms and molecules?
    Molecules are made from atoms
  • Is this a chemical reaction? Why or why not?
    No, the starting substances are the same as the substance 1 and 2.
  • Can a chemcial reaction happen with only one substance
    Yes
  • The result of a chemical reaction
    Product
  • What is the difference between atoms and molecules?
    Molecules are made from atoms
  • What is the Law that states that matter cannot be created or destroyed?
    The Law of the Conservation of Matter
  • The substances that mix together to make chemical reaction
    Reactants
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