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WHAT IS KNOWN AS CHEMICAL REACTION?
 A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.
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.
    In a chemical reaction, only the atoms present in the reactants can end up in the products. No new atoms are created, and no atoms are destroyed.
    In a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.


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