Iodine |
Symbol | I |
---|---|
Latin name | Iodium |
Atomic number | 53 |
Period | 5 |
Element category | Halogens |
Relative atomic mass | 126.90447 |
Group | VII.A |
Electronegativity | 2.5 |
Oxidation numbers | -1, 1, 3, 5, 7 |
Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p5 |
Density [g/cm3] | 4.93 |
State | Solid |
Melting point [°C] | 113.5 |
Boiling point [°C] | 184.35 |
Critical point [°C] | 546 |
Critical pressure [MPa] | 11.7 |
Atomic radius [pm] | 115 |
Covalent radius [pm] | 133 |
Thermal conductivity [W m-1K-1] | 0.449 |
Heat capacity [J K-1g-1] | 0.145 |
Discovery | 1811 |
Electrical conductivity [S m-1] | 1 · 10-7 |
1.st ionization energy [eV] | 10.4513 |
2.nd ionization energy [eV] | 19.131 |
3.rd ionization energy [eV] | 33.0 |
Stable isotopes | 1 |
Unstable isotopes | 23 |