What is the difference between a physical and chemical change? (Use words reactants, products, atoms and molecules.)

A physical change, such as a state change or dissolving, does not create a new substance, but a chemical change does. In a chemical reaction, the atoms and molecules that interact with each other are called reactants. In a chemical reaction, the atoms and molecules produced by the reaction are called products.

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acids are substances that ionize (break off) in an aqueous solution to produce hydrogen (h+) ions

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