The only way to be certain a chemical reaction has taken place is to compare the chemical properties of the substances ___ the change
Before and after
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15
A chemical reaction is a process in which atoms of one or more substances rearrange to form one or more new ___.
Substances
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15
A solid formed when two liquids are mixed is called a ___ and can be evidence of a chemical reaction.
Precipitate
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15
Two or more reactants are separated by ___ signs, as are any two or more products.
Plus
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20
A chemical equation includes the substances that ___ and the substances ___.
React, formed
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lifesaver
Give 10 points!
Oops!
shark
Other team loses 20 points!
Okay!
gift
Win 10 points!
Okay!
banana
Go to last place!
Oops!
15
Is this equation balanced?
No
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15
During a ___ change, new substances form.
Chemical
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15
Sometimes, changes in ___ properties, such as color or odor, indicate a chemical reaction.
Physical
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15
The starting substances and the substances produced have different physical and chemical ___.
Properties
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15
Is this equation balanced?
Yes
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15
___ are the substances produced by a chemical reaction.
Products
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lifesaver
Give 10 points!
Oops!
seesaw
Swap points!
Okay!
shark
Other team loses 20 points!
Okay!
thief
Give points!
5
10
15
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25
15
True or False: In a chemical equation, the reactants are written to the left of an arrow, and the products are written to the right of the arrow.
True
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boom
Lose 50 points!
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seesaw
Swap points!
Okay!
fairy
Take points!
5
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25
thief
Give points!
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15
To show that mass is conserved, a chemical equation must show that the number of each type of atom must be ___, or the same on both sides of the equation.
