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Iodine

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). The element was discovered by the French chemist Bernard Courtois in 1811…

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123I
synth
124I
synth
125I
synth
127I
100%
129I
trace
131I
synth

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Overview

History

Properties

Chemistry and compounds

Occurrence and production

Applications

Spectroscopy

Chemical analysis

Biological role

Precautions

Bibliography

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Map overview Semantic statistics

Iodine

Nodes378
Edges377
Triples325
Avg. degree1.99
Density0.005291
Components1

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Iodine

Top relations

related to history · 31
Iodine → Ampère, Ancient Greek, André-Marie Ampère, Arguments, At, Bernard Courtois, British, Brittany, Charles Bernard Desormes, Clément, Courtois, Davy, December, Desormes, France, French, Gay-Lussac, He, Humphry Davy, Imperial Institut
related to Iodine halides · 26
Iodine → Apart, Both, Br, Cl, However, Humphry Davy, I2Cl, IBr, ICl, ICN, IF, IN3, ISCN, It, IX, Joseph Louis Gay-Lussac, Justus, Liebig, Numerous, The
related to Dietary recommendations and intake · 22
Iodine → AI, Authority, Average Requirement, Dietary Reference Values, EAR, EFSA, For, Level, Medicine, Population Reference Intake, PRI, RDA, RDAs, The, The European Food Safety, The Tolerable Upper Intake, These PRIs, This, TUIL, UL
related to Iodine oxides and oxoacids · 21
Iodine → Davy, Gay-Lussac, H5IO6, HIO, HIO2, HIO3, HIO4, I2O4, I2O5, I4O9, IIII, IO, IO2, IO3, IOF3, It, IVO3, More, S2O6F2, The
related to Other binary iodine compounds · 21
Iodine → Ammonia-free NI3, An, As, AsF6, EsI3, For, Given, II, III, Iodides, IV, Other, S2I2, S2I42, Sb2F11, Se2I42, SI2, Sulfur-iodine, These, Until
related to Occurrence and production · 19
Iodine → After, Air, American Anadarko Basin, An, Ca, Chile, Earth's, Examples, HI, In, IO3, Iodide, Oklahoma, Sodium, The, The Japanese Minami Kantō, These, This, Tokyo
related to Biological role · 13
Iodine → All, During, Fifteen, In, It, Lanthanum, NIS, T0a, T1a, T3, T4, The, These
related to Organoiodine compounds · 11
Iodine → As, CHI3, Grignard, Hofmann, One, Organoiodine, PhICl2, The, They, Williamson, Wurtz
related to Properties · 10
Iodine → Astatine, At, At0, Elemental, I2, Kr, Like, Pauling, Similarly, The
related to Isotopes · 8
Iodine → As, Due, Its, Naturally, Radioisotopes, Solar System, Some, The

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Important terminology

iodide used acid stable chlorine also element compounds halogens hydrogen form bromine among solution reaction carbon known thyroid gas may

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Iodine123Isynth1.00infobox
Iodine124Isynth1.00infobox
Iodine125Isynth1.00infobox
Iodine127I100%1.00infobox
Iodine129Itrace1.00infobox
Iodine131Isynth1.00infobox
Iodine135Isynth1.00infobox
IodineAppearancelustrous metallic gray solid, black/violet liquid, violet gas1.00infobox
Iodineat T (K)2601.00infobox
IodineAtomic number (Z)531.00infobox
IodineAtomic radiusempirical: 140 pm1.00infobox
IodineBlockp-block1.00infobox
IodineBoiling point(I2) 457.4 K ​(184.3 °C, ​363.7 °F)1.00infobox
IodineBulk modulus7.7 GPa1.00infobox
IodineCAS Number7553-56-21.00infobox
IodineCovalent radius139±3 pm1.00infobox
IodineCritical point819 K, 11.7 MPa1.00infobox
IodineCrystal structure​base-centered orthorhombic (oS8)1.00infobox
IodineDensity (at 20° C)4.944 g/cm31.00infobox
IodineDiscovery and first isolationBernard Courtois (1811)1.00infobox
IodineElectrical resistivity1.3×107 Ω⋅m (at 0 °C)1.00infobox
IodineElectron configuration[Kr] 4d10 5s2 5p51.00infobox
IodineElectronegativityPauling scale: 2.661.00infobox
IodineElectrons per shell2, 8, 18, 18, 71.00infobox
IodineGroupgroup 17 (halogens)1.00infobox
IodineHeat of fusion(I2) 15.52 kJ/mol1.00infobox
IodineHeat of vaporisation(I2) 41.57 kJ/mol1.00infobox
IodineIonisation energies1st: 1008.4 kJ/mol1.00infobox
IodineIonisation energies2nd: 1845.9 kJ/mol1.00infobox
IodineIonisation energies3rd: 3180 kJ/mol1.00infobox

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