Element Iodine - I

Comprehensive data on the chemical element Iodine is provided on this page; including scores of properties, element names in many languages, most known nuclides of Iodine. Common chemical compounds are also provided for many elements. In addition technical terms are linked to their definitions and the menu contains links to related articles that are a great aid in one"s studies.

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Iodine Menu

Iodine Page OneOverview of IodineIodine"s Name in Other LanguagesAtomic Structure of IodineChemical Properties of IodinePhysical Properties of IodineRegulatory / HealthWho/When/Where/HowIodine Page TwoNuclides / IsotopesPotential Parent NuclidesIodine Page ThreeCommon Chemical Compounds of Iodine

Overview of Iodine

Atomic Number: 53Group: 17Period: 5Series: Halogens

Iodine"s Name in Other Languages

Latin: IodumCzech: JodCroatian: JodFrench: IodeGerman: Jod - rItalian: IodioNorwegian: JodPortuguese: IôdoRussian: ИодSpanish: YodoSwedish: JodAtomic Structure of IodineAtomic Radius: 1.32ÅAtomic Volume: 25.74cm3/molCovalent Radius: 1.33ÅCross Section (Thermal Neutron Capture) σa/barns: 6.2Crystal Structure: Orthorhombic
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Electron Configuration:1s2 2s2p6 3s2p6d10 4s2p6d10 5s2p5Electrons per Energy Level: 2,8,18,18,7Shell Model
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Ionic Radius:
2.2ÅFilling Orbital: 5p5Number of Electrons (with no charge): 53Number of Neutrons (most common/stable nuclide): 74Number of Protons: 53Oxidation States: ±1,5,7Valence Electrons: 5s2p5Electron Dot Model
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Chemical Properties of Iodine

Electrochemical Equivalent:
4.7348g/amp-hrElectron Work Function:Electronegativity: 2.66 (Pauling); 2.21 (Allrod Rochow)Heat of Fusion: 7.824kJ/molIncompatibilities:Ammonia, acetylene, acetaldehyde, powdered aluminum, active metals, liquid chlorineIonization PotentialFirst: 10.451Second: 19.131Third: 33Valence Electron Potential (-eV): -6.55

Physical Properties of Iodine

Atomic Mass Average: 126.9045Boiling Point: 458.55K 185.4°C 365.7°FCoefficient of lineal thermal expansion/K-1: N/AConductivityElectrical: 8.0E-16 106/cm ΩThermal: 0.00449 W/cmkDensity: 4.93g/cc
300KDescription: Halogen solid form: shiny, non-metallic, grayish-black flakes; gas: violet.Elastic Modulus:Bulk: 7.7/GPaEnthalpy of Atomization: 106.7 kJ/mole
25°CEnthalpy of Fusion: 7.76 kJ/moleEnthalpy of Vaporization: 20.88 kJ/moleFlammablity Class: Non-combustible solidFreezing Point: see melting pointHeat of Vaporization: 20.752kJ/molMelting Point: 386.65K 113.5°C 236.3°FMolar Volume: 25.74 cm3/molePhysical State (at 20°C & 1atm): SolidSpecific Heat: 0.214J/gK

Regulatory / Health

CAS Number7553-56-2RTECS: NN1575000OSHA Permissible Exposure Limit (PEL)1 ppm = 10.38mg/m3
25°C & 1 atmCeiling: 0.1 ppmOSHA PEL Vacated 1989Ceiling: 0.1 ppmNIOSH Recommended Exposure Limit (REL)Ceiling: 0.1 ppmIDLH: 2 ppm Routes of Exposure: Inhalation; Ingestion; Skin and/or eye contactTarget Organs: Eyes, skin, respiratory system, central nervous system, cardiovascular systemLevels In Humans:Note: this data represents naturally occuring levels of elements in the typical human, it DOES NOT represent recommended daily allowances.Blood/mg dm-3: 0.057Bone/p.p.m: 0.27Liver/p.p.m: 0.7Muscle/p.p.m: 0.05-0.5Daily Dietary Intake: 0.1-0.2 mgTotal Mass In Avg. 70kg human: 12-20 mg

Who / Where / When / How

Discoverer: Bernard CourtoisDiscovery Location: Dijon FranceDiscovery Year: 1811Name Origin: Greek: iôdes (violet).Abundance of Iodine:Earth"s Crust/p.p.m.: 0.14Seawater/p.p.m.: Atlantic Suface: 0.0489Atlantic Deep: 0.056Pacific Surface: 0.043Pacific Deep: 0.058Atmosphere/p.p.m.: N/ASun (Relative to H=1E12): N/ASources of Iodine:Occurs on land and in the sea in sodium and potassium compounds. World production of iodine is around 12,000 tons. Primary producing areas are Chile and Japan.Uses of Iodine:Required in small amounts by humans. Once used as an antiseptic, but no longer due to its poisonous nature. Used as a disinfectant, in pharmaceuticals, dyes, catalysts and photography.Additional Notes:

Iodine Menu

Iodine Page OneOverview of IodineIodine"s Name in Other LanguagesAtomic Structure of IodineChemical Properties of IodinePhysical Properties of IodineRegulatory / HealthWho/When/Where/HowIodine Page TwoNuclides / IsotopesPotential Parent NuclidesIodine Page ThreeCommon Chemical Compounds of Iodine

References

A list of reference sources used to compile the data provided on our periodic table of elements can be found on the main periodic table page.

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