Question

Metals are usually transparent because of their lack of a bandgap

Answer 1

Metals are not transparent

Answer 2

Normal metals are not transparent in the normal condition.They are usually opaque with obtaining a particular colour.

Because,to be transparent we need larger bandgaps from where the light ray's photon particles can easily pass through.

But the bandgaps of the metals are very close to each other that's why they are opaque.