Concept:Intermolecular forces are forces of attraction between molecules, while metallic bonds operate within a metal lattice.
Explanation:Hydrogen bonds, van der Waals forces, and dipole-dipole interactions all act between separate molecules.
Therefore, each of these is correctly classified as an intermolecular force.
In contrast, a metallic bond is the electrostatic attraction between positively charged metal ions and delocalised electrons.
This bond holds the atoms together inside a metal crystal, not between distinct molecules.
Because metallic bonding does not occur between separate molecules, it cannot be considered an intermolecular force.
Answer:D. metallic bond