Iodine

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[edit] Iodine Chemical symbol: I

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Introduction

Iodine is a chemical element that has the symbol I and atomic number 53. Iodine has 53 protons, 53 electrons, and 74 neutrons. Chemically, iodine is the least reactive of the halogens, and the most electropositive halogen after astatine. Iodine is primarily used in medicine, photography and dyes. It is required in trace amounts by most living organisms.

As with all other halogens (members of Group VII in the Periodic Table), iodine forms diatomic molecules, and hence has the molecular formula of I₂.

Iodine in Marine aquaria is poisonous to livestock! Great care should be taken if using this as a supplement and should not be supplemented without testing. If elemental iodine is detected by testing, this should be viewed as a hazardous condition. Use a dechlorinator such as Prime, which is manufactured by SeaChem products, to remove elemental iodine.

FAQ

Commonly-asked questions regarding Iodine.