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Unit Test Review

When a strip of magnesium metal is touched to a flame, a bright light and a whitish substance are produced. Why is burning of magnesium considered a chemical change?

A. Because the metal reaches a high temperature
B. Because the metal begins to melt
C. Because a new substance is formed
D. Because the metal is malleable


Sagot :

Final answer:

The burning of magnesium is considered a chemical change because a new substance is formed during the reaction.


Explanation:

When a strip of magnesium metal is touched to a flame, a bright light and a whitish substance are produced. The burning of magnesium is considered a chemical change because a new substance is formed. During the reaction, magnesium combines with oxygen to form magnesium oxide, which is a different substance than the original magnesium metal. This transformation is characteristic of a chemical change, where new substances with different properties are produced.


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