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