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1. The directional atomic bonds include a. ionic bonds . covalent bonds metallic bonds i. Metallic bonding is generally NOT responsible for . translucency . malleability ductility li. The van der Walls bond is a primary bond in polymeric materials dipole-dipole interaction - charge-transfer fluctuation . The near-neighbor distances between anions and cations in a ceramic are established by a force balance are established by a charge balance are established by the coordination number Crystal structure is conventionally described using only one unit cell of the Bravais lattices lattice and basis fcc, bcc, or hcp