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Which of the following is a chemical change
Chemical Change
The molecules stay the same and their properties stay the same.
100
a glow stick glowing
Physical Change
A cold pack for a sports injury
The chemical reaction creates a new substance (salt) with new properties
Matter is not created or destroyed in a chemical or physical change
Approximately how many elements are known to scientist today
Chemical Change
The molecules stay the same and their properties stay the same.
100
a glow stick glowing
Physical Change
A cold pack for a sports injury
The chemical reaction creates a new substance (salt) with new properties
Matter is not created or destroyed in a chemical or physical change
What happens to a substance during a physical change?
Chemical Change
The molecules stay the same and their properties stay the same.
100
a glow stick glowing
Physical Change
A cold pack for a sports injury
The chemical reaction creates a new substance (salt) with new properties
Matter is not created or destroyed in a chemical or physical change
A change is a substance that results in the formation of a brand new substance with new properties
Chemical Change
The molecules stay the same and their properties stay the same.
100
a glow stick glowing
Physical Change
A cold pack for a sports injury
The chemical reaction creates a new substance (salt) with new properties
Matter is not created or destroyed in a chemical or physical change
A change in size or shape but no new substance created
Chemical Change
The molecules stay the same and their properties stay the same.
100
a glow stick glowing
Physical Change
A cold pack for a sports injury
The chemical reaction creates a new substance (salt) with new properties
Matter is not created or destroyed in a chemical or physical change
Sodium is an explosive metal and Chlorine is a toxic gas. Why are they safe to eat when they combine to make salt?
Chemical Change
The molecules stay the same and their properties stay the same.
100
a glow stick glowing
Physical Change
A cold pack for a sports injury
The chemical reaction creates a new substance (salt) with new properties
Matter is not created or destroyed in a chemical or physical change
The Law of Conservation of Mass says
Chemical Change
The molecules stay the same and their properties stay the same.
100
a glow stick glowing
Physical Change
A cold pack for a sports injury
The chemical reaction creates a new substance (salt) with new properties
Matter is not created or destroyed in a chemical or physical change
An example of an endothermic reaction would be
Chemical Change
The molecules stay the same and their properties stay the same.
100
a glow stick glowing
Physical Change
A cold pack for a sports injury
The chemical reaction creates a new substance (salt) with new properties
Matter is not created or destroyed in a chemical or physical change
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