Answer:
3
Explanation:
Number of Energy Levels: 3
First Energy Level: 2
Second Energy Level: 8
Third Energy Level: 7
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A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity. Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding.
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