Discovered By: Ferdinand Reich, Hieronymus Theodor Richter
Discovery year: 1863

The following table showing some properties of Indium(In):

Table Example
Atomic number 49
Group 13
Period 5
Block p
Electrons 49
Protons 49
Neutrons 66
Atomic weight 114.818
Oxidation states +3
Ionic charge In^3+


Table Example
Electrons per shell K2 L8 M18 N18 O3
Electron configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^1
Atomic radius 156 pm
Covalent radius 142 pm
Van der Waals radius 193 pm
Boiling point 2072°C
Melting point 156.6°C
Phase Solid
Fusion heat 3.26 kJ.mol^-1
Thermal expansion 3.21*10^-5 K^-1


Table Example
Color Silver
Brinell hardness 8.83 MPa
Density 7310 kg.m^-3
Liquid density 7020 kg.m^-3
Mohs hardness 1.2
Molar volume 1.571.10^-5 m^3.mol^-1
Sound speed 1215 m.s^-1
Thermal conductivity 82 W.m^-1.K^-1
Young's modulus 11 GPa
Electric type Conductor


Table Example
Magnetic type Diamagnetic
Volume magnetic susceptibility -1.02*10^-5
Resistivity 8*10^-8 Ohm.m
Superconducting point 3.41 K
Electronegativity 1.78
Valence 3
Radioactive No
Neutron cross section 194 barn
Electron affinity 28.9 kJ.mol^-1
First ionization energy 558.3 kJ.mol^-1