Here's why:
* Chemical reactions involve the sharing or transfer of electrons. Electrons are the subatomic particles that reside in the outermost shell of an atom, called the valence shell. These electrons are responsible for forming bonds with other atoms.
* Protons and neutrons reside in the nucleus of an atom. They are tightly bound and don't directly participate in the exchange or sharing of electrons that defines a chemical reaction.
However, there are some exceptions:
* Nuclear reactions involve changes within the nucleus of an atom, including the protons and neutrons. These reactions are distinct from chemical reactions and involve much higher energies. Examples include nuclear fission and fusion.
* Isotopes are atoms of the same element with different numbers of neutrons. While they have the same number of protons and electrons, their different masses can influence the rate of certain chemical reactions.
In summary: While electrons are the key players in chemical reactions, protons and neutrons within the nucleus generally don't participate directly. However, nuclear reactions and isotopic variations can influence the course of chemical processes.
