Bond formed by a sea of delocalized electrons?

• A. Intermolecular Forces
• B. Hydrogen Bond
• C. Ionic Bond
• D. Metallic Bond

Answer: (D)

Metallic bonding is defined by a lattice of positive metal ions surrounded by a sea of delocalized electrons that move freely among the ions. These electrons aren’t tied to any specific atom, so they can flow and hold the whole structure together through electrostatic attraction to the cations. This delocalized electron cloud explains why metals conduct electricity and are malleable, since the bonds are non-directional and can slide without breaking. So the bond formed by a sea of delocalized electrons is the metallic bond. The other options describe different interactions: intermolecular forces are attractions between separate molecules, hydrogen bonding is a specific strong dipole interaction involving hydrogen with electronegative atoms, and ionic bonds come from full electron transfer creating oppositely charged ions.