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Chemical element: Iodine (I)
| Atomic Number: | 53 |
| Element Symbol: | I |
| Element Name: | Iodine |
| Atomic Weight: | 126.90447 |
| Group Number: | 17 |
| Group Name: | Halogen |
| Period Number: | 5 |
| Block: | p-block |
| Ground State Configuration: | [Kr] 4d10 5s2 5p5 |
| Ground State Level: | 2Po3/2 |
| Standard State: | Solid |
| Common Valences: | 1,3,5,7 |
| Bond Length: | 266.6 |
| Atomic Radius Empirical: | 140 |
| Atomic Radius Calculated: | 115 |
| Covalent Radius Empirical: | 133 |
| Vander Waals Radius: | 198 |
| Electron Affinity: | 295.2 |
| First Ionization Energy: | 1008.4 |
| Pauling Electronegativity: | 2.66 |
| Sanderson Electronegativity: | 2.78 |
| Allred Rochow Electronegativity: | 2.21 |
| Mulliken Jaffe Electronegativity: | 2.74 |
| Allen Electronegativity: | 2.359 |
| Density Of Solid: | 4940 |
| Molar Volume: | 25.72 |
| Bulk Modulus: | 7.7 |
| Electrical Resistivity: | > 10**15 |
| Melting Point: | 113.7 |
| Boiling Point: | 184.3 |
| Critical Temperature: | 546 |
| Thermal Conductivity: | 0.449 |
| Enthalpy Of Fusion: | 7.76 (per mol I atoms) |
| Enthalpy Of Vaporization: | 20.9 (per mole I atoms) |
| Enthalpy Of Atmization: | 107 |
| Most Common Oxidation Numbers: | 7,5,3,1,-1 |
| Color: | Violet-dark grey, lustrous |
| Classification: | Non-metallic |
| Discovered By: | Bernard Courtois |
| Discovered At: | France |
| Discovered When: | 1811 |
| Origin Of Name: | From the Greek word iodes meaning violet |
Calculate the molecular weight of Iodine or molecular weight I.
Also see the full list of chemical elements and atomic weights.
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