When two atoms approach each other and react with each other, it is their outer shells that come into contact first, and it is therefore the electrons in their outer shells that are normally involved in any chemical reaction.electrons are known as

Orbiting electrons
Valence electrons
Shell electrons
Bonding electrons
Valence electrons?

Electrons orbit so that must be true

Electrons are not stationary so that is true. Valence electrons (you listed this twice) lumped together is true. Many profs refer to these as bonding electrons so that is true. My opinion is that this is not a very good question/answer.

Yes, the electrons in the outermost shell of an atom are known as valence electrons. They are the electrons that are involved in chemical reactions and are responsible for the formation of chemical bonds between atoms.

Yes, the electrons involved in chemical reactions are called valence electrons. Valence electrons are the electrons found in the outermost energy level or shell of an atom. These electrons are responsible for the atom's chemical properties and its ability to form bonds with other atoms. When two atoms approach each other and react, it is their valence electrons that primarily interact and determine the outcome of the chemical reaction.