Indium

Symbol | In
Latin name | Indium
Atomic number | 49
Period | 5
Element category | Metals
Relative atomic mass | 114.82
Group | III.A
Electronegativity | 1.7
Oxidation numbers | 1, 3
Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p1
Density [g/cm3] | 7.31
State | Solid
Melting point [°C] | 156.63
Boiling point [°C] | 2080
Atomic radius [pm] | 156
Covalent radius [pm] | 144
Thermal conductivity [W m-1K-1] | 81.6
Heat capacity [J K-1g-1] | 0.233
Discovery | 1863
Hardness [Mohs scale] | 1.2
Young's modulus [GPa] | 11
Electrical conductivity [S m-1] | 3.4 · 106
1.st ionization energy [eV] | 5.7864
2.nd ionization energy [eV] | 18.869
3.rd ionization energy [eV] | 28.03
Stable isotopes | 2
Unstable isotopes | 32