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a chemical reaction is when you cant change something back to the way it was before 

Chemical reactions include breaking chemical bonds among reactant molecules along with creating new bonds between the atoms in product particles.

What is chemical reaction?

A chemical reaction can be referred to as a process that results in the chemical change of one group of chemical substances into some other set of chemical substances.

What is  chemical bonds?

A chemical bond can be referred to as a long-term attraction among atoms, ions, and molecules which allows chemical compounds to form.

Chemical reactions include breaking chemical bonds among reactant molecules along with creating new bonds between the atoms in product particles. The count of atoms before as well as after the chemical change will be the same along with the count of molecules that would change.

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