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Chemical Reactions

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  • What burned in the video?
    Steel wool
  • Did the number of atoms in oxygen (O2) change during chemical reaction?
    No
  • The total number of atoms stays the same in a chemical change
    True
  • In a chemical reaction, the number of atoms does not change but a new ... is formed
    Substance
  • Did the number of atoms in iron (Fe) change during chemical reaction?
    No
  • in a chemical change , the chemicals we start with are ...
    Reactants
  • A chemical reaction ...
    forms a new substance
  • Whay caused the steel wool to burn?
    A battery
  • In a chemical change, the products you form are ...
    Products
  • Is burning steel, Fe + O2 ?
    Yes
  • in the chemical reaction, what happened?
    The oxygen atoms were rearranged
  • Was iron oxide formed?
    Yes
  • In a chemical reaction, the number of atoms remains the same before & after the reaction
    True
  • After a chemical change, does it have new properties?
    Yes
  • The total number of atoms does not change in a chemical reaction
    True