Which part of an atom is actively exchanged or shared during the formation of a chemical bond?

• A. Nucleus
• B. Neutrons
• C. Valence electrons
• D. Protons

Answer: (C)

Verified step by step guidance

1. Understand that atoms form chemical bonds to achieve a more stable electron configuration, often resembling the nearest noble gas configuration.
2. Recall that the nucleus (containing protons and neutrons) remains largely unchanged during chemical bonding; it is the electrons that participate in bond formation.
3. Identify that electrons in the outermost shell of an atom, called valence electrons, are the ones involved in bonding because they are the most accessible for interaction with other atoms.
4. Recognize that valence electrons can be either shared between atoms (covalent bonds) or transferred from one atom to another (ionic bonds) during bond formation.
5. Conclude that the part of the atom actively exchanged or shared during chemical bonding is the valence electrons.