Alphabetical Index
Browse by Elements
Keyword Search
ASTM Electrolytes
Macro Etchants
Micro Etchants
Named Etchants
New Etchants
Al and Al Alloys
Cu and Cu Alloys
Fe and Fe Alloys
Ni and Ni Alloys
Carbide Etchants
Fluoride Etchants
Nitride Etchants
Other Etchants
Oxide Etchants
Phosphide Etchants
Single Crystal Etchants
Thin Film Etchants
Wafer Etchants
Help
Home
Iodine
Symbol: I
Atomic Number: 53
Atomic Weight: 126.90447
Element Classification: Halogen
Discovered By: Bernard Courtois
Discovery Date: 1811 (France)
Name Origin: Greek: iodes (violet colored).
Density (g/cc): 4.93
Melting Point (°K): 386.7
Boiling Point (°K): 457.5
Appearance: Shiny, black nonmetallic solid
Atomic Radius (pm): n/a
Atomic Volume (cc/mol): 25.7
Covalent Radius (pm): 133
Ionic Radius: 50 (+7e) 220 (-1e)
Specific Heat (@20°C J/g mol): 0.427 (I-I)
Fusion Heat (kJ/mol): 15.52 (I-I)
Evaporation Heat (kJ/mol): 41.95 (I-I)
Thermal Conductivity (@25°C W/m K):
Debye Temperature (°K): n/a
Pauling Negativity Number: 2.66
First Ionizing Energy (kJ/mol): 1008.3
Oxidation States: 7, 5, 1, -1
Electronic Configuration: [Kr] 4d10 5s2 5p5
Lattice Structure: Orthorhombic (ORC)
Lattice Constant (Å): 7.720
Lattice C/A Ratio: n/a