 As we move down the column to iodine, the reactivity continues to decrease due to decreasing electronegativity. In the beaker we have some solid iodine. We will heat the iodine. The iodine will sublime and go directly from the solid to the vapor. The iodine is less reactive than the bromine. Iodine will react with all the metals and the non-metals except the noble gases. The evaporating dish contains some ice to cool the iodine vapor. The iodine will condense directly from the vapor to the solid, forming iodine crystals. The iodine crystals have a very characteristic metallic gray appearance.