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2. Chemical reactions changes occur when the bonds between atoms in a molecule are created or destroyed.

3. When you reach your its boiling point, the molecules in liquid have enough energy to become a gas.

4. When you have a solid with more than one type of compound, it is called a mixture.

5. A Crystal is a form of solid where the atoms are arranged is a very specific order.

6. If you have different types of molecules dissolved in a liquid, it is called a solution

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