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