Discovered By: Barnard Courtois
Discovery year: 1811

The following table showing some properties of Iodine(I):

Table Example
Atomic number 53
Group 17
Period 5
Block p
Electrons 53
Protons 53
Neutrons 74
Atomic weight 126.90447
Oxidation states -1, +1, +5, +7
Ionic charge I^-


Table Example
Electrons per shell K2 L8 M18 N18 O7
Electron configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^5
Atomic radius 115 pm
Covalent radius 139 pm
Van der Waals radius 198 pm
Boiling point 184.3°C
Melting point 113.7°C
Phase Solid
Fusion heat 7.76 kJ.mol^-1
Color State gray


Table Example
Bulk modulus 7.7 GPa
Density 4940 kg.m^-3
Molar volume 2.569*10^-5 m^3.mol^-1
Electrical type Insulator
Magnetic type Diamagnetic
Resistivity 1*10^7 Ohm.m
Electronegativity 2.66
Valence 7
Radioactive No
Neutron cross section 6.2 barn