Iodine

Atomic number53
Atomic weight126.90447
Discovery (year)1811
Atomic radius (A)1.34
Melting point (oC)113.6
Boiling point (oC)182.8
Density (g/cm3)4.93
Specific heat (cal/g oC)0.052
Ionization potential (eV)10.451
Electron Affinity (eV)3.061