Which part of an atom is directly involved in chemical changes

The part of an atom which is directly involved in chemical changes is the electron. Chemical reactions involves the transfer of electrons between reacting particles. The particles react by either gaining or loosing electrons therefore the chemical change occurs.

Answer with Explanation

The part of an atom that is directly involoved in chemical changes is an electron and an electron cloud. Chemical reactions are due to chemical bonding in a chemical reaction. Bonds are formed to form molecules and compounds. The electrons are the subatomic particles that form bonds with the electrons of other atoms. Due to this reason, all the elements that present in a group have similar chemical properties as they have the same number of valence electrons.