this is an example of a(n) bond. # covalent # hydrogen # ionic # metallic

Answer:

D. metallic

Brief Explanation:

In metallic bonding, positive metal ions ($A^{+}$ in the diagram) are surrounded by a sea of delocalized electrons (represented by the blue - dots and wavy lines). This is characteristic of metallic bonding, different from covalent (sharing of electrons between atoms), hydrogen (weak intermolecular bond involving hydrogen), and ionic (transfer of electrons between ions) bonds.