Question

What is reaction??
_________________

Answer 1

Answer:

$\huge\large{\sf{\underline{\underline\pink{Answer!!}}}}$

A reaction is an action taken in response to something.

___________________________

Answer 2

What is reaction??

A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another.[1] Classically, chemical reactions encompass changes that only involve the positions of electrons in the forming and breaking of chemical bonds between atoms, with no change to the nuclei (no change to the elements present), and can often be described by a chemical equation. Nuclear chemistry is a sub-discipline of chemistry that involves the chemical reactions of unstable and radioactive elements where both electronic and nuclear changes can occur.