Metallic properties of iodine Why does iodine exhibit metallic properties at room temperature although being a non-metal? Are there any similar elements like this?
Iodine is a metalloid. Metalloid elements have one or more allotropes with properties intermediate between those of a metal and a nonmetal.

Metals are lustrous, ductile, and conductive of heat and electricity.

Nonmetals are matte, brittle, and insulators.

Metalloids may be semiconductors, like silicon, germanium, arsenic, and carbon (graphite). They may be lustrous, but brittle, like iodine and tellurium.