Question

what is metallic Bond ?

Answer 1

metallic bond is the chemical bonding that results from the attraction between metal cations and surrounding sea of electrons.

Answer 2

In a metallic bond , valence electron are spread all over the crystal, more or less uniformly . therefore , metallic bond is non -directional in character.
since here valence electron are mobile , they are weakly attached by the nuclei ,here metallic bond are weaker . Because of this , heat of vaporization of metal to free atoms is small .