I
Iodine
previous element
I |
|
|
Iodine |
||
| previous element |
next element |
| Atomic number | 53 |
| Atomic weight | 126.9045 |
| Orbital electronic configuration | (Kr)4d105s25p5 |
| First ionization energy (eV) | 10.451 |
| Second ionization energy (eV) | 19.13 |
| Electronegativity (Pauling) | 2.66 |
| Atomic radius (Å) | 1.32 |
| Bonding radius (Å) | 1.33 |
| Oxidation states | ±1, 5, 7 |
Properties |
|
| Density (g/ml) | 4.92 |
| Melting point (K) | 386.7 |
| Boiling point (K) | 458.4 |
| Heat of vaporization (kJ/mol) | 20.752 |
| Heat of fusion (kJ/mol) | 7.824 |
| Specific heat capacity (Jg-1K-1) | 0.214 |
| Crystal structure | orthorhombic |