It is employed in medicine to monitor thyroid gland functioning, to treat goitre and thyroid cancer, and to locate tumours of the brain and of the liver. Chemical Properties: Iodine, I 2 is not reactive towards with oxygen, O 2, or nitrogen, N 2. An atom of Iodine in the gas phase, for example, gives off energy when it gains an electron to form an ion of Iodine. Nitrogen surface area is a measurement of the amount of nitrogen which can be adsorbed on a given mass of carbon black. Iodine, he went on was essential for the proper development of the thyroid gland in the neck, and that if one didn't eat the right kind of salt, especially as a child, one might develop goitre and one's mental development would also be affected. M.Pt: 114°C. Live Science is supported by its audience. Reagents for iodine test: Iodine solution containing: Potassium iodide and water; Procedure for performing iodine test: Take 1 ml of original solution and add it to a test tube. Overview Information Iodine is a chemical element. Iodine is the most electropositive halogen and the least reactive of the halogens even if it can still form compounds with many elements. Iodine sublime easily on heating to give a purple vapour. Iodine is an essential micronutrient that you have to get from a supplement or food. Iodine. Iodine is a non-metallic, dark-gray/purple-black, lustrous, solid element. Iodine is therefore a low melting point solid.

Group 7 of the Periodic Table – The Halogens (non-metals). Iodine is water insoluble and turns black when exposed to light, Iodine is used in the diet and if we dont get enough iodine we may get impaired physical development in children. … The number of electrons in each of Iodine's shells is 2, 8, 18, 18, 7 and its electron configuration is [Kr] 4d 10 5s 2 5p 5.The iodine atom has a radius of 140.pm and it's Van der Waals radius is 198.pm. Halogens are non-metal elements that include iodine, fluorine, chlorine, bromine, and astatine. The chemical symbol for Iodine is I . Iodine is the heaviest of the stable halogens, it exists as a lustrous, purple-black metallic solid at standard conditions that sublimes readily to form a … atomic number 53 atomic weight 126.9044 melting point 113.5 °C (236 °F) boiling point 184 °C (363 °F) specific gravity 4.93 at 20 °C (68 °F) oxidation states −1, +1, +3, +5, +7 electron In addition, iodine is a necessary nutrient for good health. Iodine fulfills a vital function in the body yet must be obtained from outside sources such as seafood, seaweed or iodine supplements. The crystallinity suggests a regular packing of the molecules. As with all other halogens , when freed from its compounds iodine forms diatomic molecules (I2).

Doc Brown's Chemistry KS4 science GCSE/IGCSE/O level Chemistry Revision Notes.

Iodine is an essential trace element. Low energy? (b) This is because halogens are reactive non-metals. Iodine adsorption (expressed in mg/g of carbon) measures the amount of iodine which can be adsorbed on the surface of a given mass of carbon black.

Learn iodine atomic number, atomic mass of iodine and iodine uses. However, iodine will form an aqueous solution in the presence of iodide ion. The body needs iodine but cannot make it. Iodine (I), chemical element, a member of the halogen elements, or Group 17 (Group VIIa) of the periodic table. An atom of Iodine in the gas phase, for example, gives off energy when it gains an electron to form an ion of Iodine. Learn iodine atomic … The iodine needed by the body must come from the diet. Iodine deficiency disorders result from inadequate thyroid hormone production secondary to insufficient iodine . Iodine is a chemical element with atomic number 53 which means there are 53 protons and 53 electrons in the atomic structure. The chemical symbol for Iodine is I. Iodine is the heaviest of the stable halogens, it exists as a lustrous, purple-black metallic solid at standard conditions that sublimes readily to form a … Iodine is an important mineral, though few food sources are rich in it. Iodine is a Block P, Group 17, Period 5 element. Iodine is the 61st element in terms of abundance, making it not only one of the least abundant nonmetallic elements on Earth but also one of the rarest elements needed for life. Iodine, I 2. Despite this, iodine is … Group 7 HALOGEN elements of the Periodic Table. Physical Properties: Iodine is a solid diatomic non-metal that is very pungent in odor and a corrosive poison.