What happens to the atoms molecules of a substance during a chemical reaction?

In a chemical reaction, reactants react with each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products. This is what happens to atoms and molecules in a chemical reaction.

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Astrix <3

6.4 cm (max) - 25 cm (min)

answer: they produce more slow than unicellular organisms.