The periodic Table
coloured by Discovery
coloured by States
Constants, Astronomy
Constants, Physics
SI Units
by Peder Axensten

I


in WebElements
in X-Ray info 		I, 53
iodine (English)
iode, m. (French)
Jod, n. (German)
iod (Russian)
yodo (Spanish)
jod (Swedish)

Symbol, numberI, 53 (halogen), Group: 17; 7A
Weight126.90447
In Nature
Discovered1811, by Bernard Courtois (France)
Density  [kg/m3]4930 [293 K] (solid)   
Molar volume25.74 cm3
Melting Temperature386.7 K   (113.7 °C)   Enthalpy: 41.67 kJ/mol
Boiling Temperature457.50 K   (184.5 °C)   Enthalpy: 15.27 kJ/mol
Electrical resistance1.37E7 [293 K] Wm
ThermalConductivity: 0.449 [300 K] W/Km     
Ionisation [kJ/mol]
  M-->  M+--> M2+--> M3+--> M4+--> M5+--> M6+--> M7+--> M8+--> M9+-->M10+
Thermodynamics
State DfH° DfG° S° CpH H°298.15-H°0
[kJ/mol] [J/Kmol] [kJ/mol]
Isotopes
Mass In nature Half-life Spin m/mN NMM Decay
127I 126.904473 100% stable 5/2 2.81328