What is chemical reaction!?​

A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another. 

a process that involves rearrangement of the molecular or ionic structure of a substance, as distinct from a change in physical form or a nuclear reaction.

< > according to newton's third law of motion, forces always act in equal but opposite pairs. another way of saying this is for every action, there is an equal but opposite reaction.< >