IZ =  53



Iodine
From the Greek "iodes", meaning "violet"
(AM) Atomic Mass 126.9045  amu    Oxidation States +1, +3, +5, +7, -1
   (BP) Boiling Point 184.35  °C    (MP) Melting Point 113.5  °C
   (ρ) Density 4.94  g/cm3    Crystal Structure Orthorhombic
   ( χ ) Electronegativity 2.5    (AR) Atomic Radius 1.33  Å
   Physical State Solid (C) Heat Capacity 0.214  J/g °C
Electronic-Config [Kr]  4d10  5s2  5p5     (I1) First Ionization E 1008.36  kJ/mol
   (ΔHvap) Heat of Vaporization 41.57  kJ/mol     (ΔHfus) Heat of Fusion 15.52  kJ/mol
   Year of Discovery 1811    Location of Discovery France
(E°) Standard Potential I2 (s) ⇔ 2 I- (0.540 V)
Stable isotopes  127I
Discovered/Synthesized by Barnard Courtois
Natural Source Isolated from seaweed
Common Uses Disinfectant for wounds & drinking water, added to salt for thyroid disease, photo film
Other Info Responsible for the characteristic smell of seaweeds
Exists in nature as the diatomic molecule I2
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