The type of bond formed is known as a metallic bond
In order to identify the type of bond formed between atoms, you must know the requirements needed for each:
A covalent bond can only have non-metals. In this type of bonding, electrons are shared between atoms.
An ionic bond has both non-metals and metals. In this type of bonding, electrons are transferred. In other words, one atom gives electrons to another atom.
Finally, a metallic bond has only metals. In this type of bonding, electrons are delocalized. Essentially, it means that electrons just float around the metal atoms, and aren't designated to a specific atom. (This quality is the reason why metals are so conductive)
If you have any more questions, don't be afraid to ask!
Good luck :))
