which diagram(s) represents the bonding pattern of metals?\na and b\nc and d\na\nc

Brief Explanations:

In metallic bonding, metal atoms lose their outer - shell electrons to form a sea of delocalized electrons. The positively charged metal ions are arranged in a lattice. Diagram A shows positively charged ions in a lattice with a sea of delocalized electrons (represented by the small dots), which is characteristic of metallic bonding. Diagram B has negatively charged ions which is incorrect for metals. Diagrams C and D represent covalent - like bonding patterns (shared electrons between atoms) rather than metallic bonding.

Answer:

C. A