Iodine
Iodine is a chemical element that has the symbol I and atomic number 53. Naturally-occurring iodine is a single isotope with 74 neutrons.
Chemically, iodine is the least reactive of the halogens, and the most electropositive halogen after astatine. However, the element does not occur in the free state in nature. As with all other halogens (members of Group VII in the Periodic Table), when freed from its compounds iodine forms diatomic molecules (I2).
| General | |
|---|---|
| Atomic number: | 53 |
| Symbol: | I |
| Atomic weight: | 126.904 |
| Boiling Point (C): | 183 |
| Melting Point (C): | 113.7 |
| Density: | 4.94 |
| heatVapor: | 5.2 |
| heatFusion: | 1.87 |
| Electrical Conductivity: | 1e-15 |
| Thermal Conductivity: | 0.001 |
| Specific Heat Capacity: | 0.052 |
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