Name :  Iodine
Symbol :  I
Atomic Number :  53
Atomic Weight :  126.90447
Specific Heat :  0.214 J/gK
Melting Point :  113.5°C
Vaporization :  20.752 kJ/mol
Boiling Point :  184.35°C @ 35 atmos.
Electronegativity :  2.66
Density@293 K :  4.93 g/cm³
Discovered :  Bernard Courtois, France, 1811
Description :  Shiny, black, non-metalic solid as a gas it is violet and intensely irritating to the eyes, nose and throat.
Uses :  Required in small amounts by humans. Once used as an antiseptic, but no longer due to its poisonous nature.