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 form a deep violet liquid at 114 °C (237 °F), and boils to a violet gas at 184 °C (363 °F).

Iodine is a naturally occurring element found in sea water and in certain rocks and sediments. There are non radioactive and radioactive forms of iodine. Iodine is used as a disinfectant for cleaning surfaces and storage containers and is used …

雙原子碘 （化學式 I2）是 碘 元素的存在形式，由兩個碘 原子 組成。 在 標準情況 下，它是紫色 固體。 雙原子碘會直接 升華，從固態變成 氣態。 它具有 刺激性，必須小心處理。 和其他鹵素一樣，雙原子碘可以與許多其他元素形成化合物。 然而，它的反應性小於較輕的鹵素，例如 氟氣 和 氯氣。 雙原子碘與 氫氣 反應，形成 碘化氫： 雙原子碘可以被 還原 成 碘化物，是一種 氧化劑，但強度弱於更輕的鹵素。 (E° = 0.54 V)。 雙原子碘可以氧化 硫化氫，形成硫單質： [8] 被 …

在碘水溶液中具有杀菌作用的成分为元素碘(i2)、三碘化物的离子(i3-)和次碘酸(hio)，其中hio的量较少，但杀菌作用最强;i2次之;解离的i3-的杀菌作用极微弱。

公式解析：=IF (OR (逻辑1，逻辑2，逻辑…)，真值，假值)，说明：OR在公式中任意满足一个条件即可。 目标：任意学科及格. 步骤1: 点击单元格 “I2”， 输入公式 “=IF (OR (C2>=65,D2>=65,E2>=65),"是","")”。 步骤2: 点击单元格 “I2” 下拉， 即可完成此操作。 公式解析：=IF (AND (逻辑1，逻辑2，逻辑…)，真值，假值)，说明：AND在公式中任意满足所有条件即可。 目标：语数外都及格. 步骤1: 点击单元格 “J2”， 输入公式 “=IF (AND …

2025年2月7日 · Iodine exhibits a +5 oxidation state in the moderately strong iodic acid (HIO 3), which can be readily dehydrated to yield the white solid iodine pentoxide (I 2 O 5).

Today, iodine has many commercial uses. Iodide salts are used in pharmaceuticals and disinfectants, printing inks and dyes, catalysts, animal feed supplements and photographic chemicals. Iodine is also used to make polarising filters for LCD displays.

2025年2月7日 · iodine (I), chemical element, a member of the halogen elements, or Group 17 (Group VIIa) of the periodic table. In 1811 the French chemist Bernard Courtois obtained a violet vapor by heating seaweed ashes with sulfuric acid as a …

2021年3月13日 · Is there any logical way to determine whether $\ce{I-}$ will oxidize to form $\ce{I2}$ or $\ce{IO3-}$ is a reaction ? For example, In reaction of $\ce{KMnO4}$ with $\ce{I-}$ in acidic medium $\ce{I...

In emission in electric discharges in the presence of foreign gases, 2740 - 2490 . Also observed for 129 I 2, confirming the vibrational numbering. Emission bands in the region 2240 - 1950 Angstroms are assigned by Haranath and Rao, 1958, to a separate system (called H → X), with v 00 = 48072 and w ~ 79.