Is Iodine a soild or gas?

Answer 1

Elemental iodine is a solid. But it is a volatile solid in that chemists will use solid iodine in a chamber to "iodine stain" substances in thin layer chromatography. Thus iodine is like having a volatile solid.

Answer 2

Iodine is a solid at room temperature. It has a characteristic purple color and sublimes directly from a solid to a gas when heated, without passing through a liquid phase.