Which non-metal is solid at room temp. but sublimes into a violet vapour?
Iodine Color: bluish-black Hardness: mohs Chemical clock reactions – amazing color changes. Iodine crystals sublimate (turn from solid to gas without becoming liquid) and then freeze back to solid iodine. Harmful effects: In small doses, iodine is slightly toxic and it is highly poisonous in large amounts. Elemental iodine is an irritant which can cause sores on the skin. Iodine vapor causes extreme eye irritation. Characteristics: Iodine is a bluish-black, lustrous solid. Although it is less reactive than the elements above it in group 17 (fluorine, chlorine and bromine) it still forms compounds with many other elements. Although iodine is a non-metal, it displays some metallic properties. When dissolved in chloroform, carbon tetrachloride or carbon disulphide, Iodine yields purple colored solutions. It is barely soluble in water, giving a yellow solution. Uses: Iodine is important in medicine, in both radioactive and non-radioactive forms. Iodide and thyroxin, which contains iodine,
