Symbol	I	Atomic radius: pm	133	Fusion: kJ/Mole	15.52
Name	Iodine	Ionic radius: pm	(-1)220	Boiling point: °C	184
Atomic number	53	Electron affinity	3.06	Melting point: °C	114
Atomic weight	126.9	1st  ion potential	10.45	Specific Heat Cap: J/(g K)	0.15
Classification	Non-Metal	Natural form	Solid	Thermal Cond: W/(cm K)	0.004
Configuration	[Kr]4d105s2p5	Crystal structure	Ortho	Electrical Cond	8x10-16
Oxidation states	+/-1,5,7	Density	4.92	Abundance: mg/kg-crust	0.45
Electronegativity	2.66	Vaporization: kJ/Mole	41.57
Iodine was discovered in 1811 by Bernard Courtois.			Uses - nutrient, antiseptic