Is a superconductor a metal or nonmetal?

Answer 1

Only a few of the materials that have been supercooled have become superconductors,

and not all of those are metals. There have even been some organic superconductors

discovered.

Answer 2

A superconductor can be either a metal or a nonmetal. The ability to superconduct is not determined by whether a material is a metal or nonmetal, but rather by its specific properties at low temperatures.