Iodine is a chemical element; it has symbol I and atomic number 53. The heaviest of the stable halogens, it exists at standard conditions as a semi-lustrous, non-metallic solid that melts to …

2024年6月8日 · Tincture of iodine turns black when exposed to excessive heat or light, which leads to the breakdown of iodine molecules, resulting in the formation of iodine vapor. This …

Iodine is a dark violet-gray-black [2] solid. It is also a nonmetal and a halogen. It sublimes when heated to make a bright purple vapor. This vapor is very irritating, although colorful. Iodine …

2025年1月10日 · Iodine - Element, Halogen, Gas: Iodine is a nonmetallic, nearly black solid at room temperature and has a glittering crystalline appearance. The molecular lattice contains …

2016年8月31日 · In this classic experiment, often performed in high school chemistry classes, a small piece of starch, such as a potato slice, is placed in a test tube with a few drops of iodine …

2023年9月30日 · Iodine is a lustrous dark-gray to purple-black solid at room temperature. Although it is a nonmetallic element, it often has a metallic sheen. It sublimates easily, forming …

2017年4月19日 · As a pure element, iodine is a lustrous purple-black nonmetal that is solid under standard conditions. It sublimes (changes from a solid to a gaseous state while bypassing a …

Iodine with the symbol ‘I’ is a dark grey or purple blackish nonmetallic element with atomic number 53 in the Periodic Table. It is the least reactive and most electropositive halogen, even though …

Only iodine element in the presence of iodide ion will give the characteristic blue black color. Neither iodine element alone nor iodide ions alone will give the color result. This phenomenon …

2019年5月7日 · Solid iodine is blue-black in color, with a metallic sheen. At ordinary temperatures and pressures, iodine sublimates into its violet gas, so the liquid form is not seen. The color of …