Final answer:
Metallic bonds form due to the attraction between delocalized electrons and the metal's cations. This creates a strong bond that holds metal atoms together.
Step-by-step explanation:
Metallic bonds form due to the attraction between the delocalized electrons and the metal's cations. In a metallic bond, the positive metal ions are surrounded by a sea of delocalized electrons, which are attracted to the positively charged ions. This attraction creates a strong bond that holds the metal atoms together in a crystal lattice structure.