Answer:
A metallic bond of copper atoms with metallic bond of tin atoms to form metallic bond.
Step-by-step explanation:
Metallic bond is a type of bond that is formed between positively charged atoms in which there is sharing of electrons between them.
Metallic bonds are formed between metal atoms. When metal atoms unite, they share electrons among themselves and each one of them has valence electrons.
Bronze is an alloy of metals and it consist of copper and tin which makes them to be bonded by metallic bond.