The insulator is not a characteristic of metals and their ability to form metallic bonds.
C) insulator
Step-by-step explanation:
Atoms quickly lose electrons to form positive ions in metals. Further, the delocalized electrons that surround these ions are responsible for their conductivity. The electrostatic interactions between ions and the electron cloud are called the metallic bond.
The physical properties include malleability, thermal, ductility, strength, opacity, conductivity, and luster. Malleability is the deformation property, and ductility is the stretching capacity of atoms in a metallic bond.