2. **Which of the following statements describes a difference between a chemical change and a physical change? a. A physical change occurs only in elements; a chemical change occurs only in compounds.

2. **Which of the following statements describes a difference between a chemical change and a

physical change?
a. A physical change occurs only in elements; a chemical change occurs only in compounds.
b. A chemical change occurs only in elements; a physical change occurs only in compounds.
c.
The result of a physical change is a different composition; in a chemical change, the composition
remains the same.
d. The result of a chemical change is a different composition; in a physical change, the composition
remains the same.

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