← Back to periodic table
Indium (In)
Atomic number: 49 · Category: post-transition metal · Group 13 · Period 5 · Phase: Solid
Indium is a chemical element with symbol In and atomic number 49. It is a post-transition metallic element that is rare in Earth's crust. The metal is very soft, malleable and easily fusible, with a melting point higher than sodium, but lower than lithium or tin.
Atomic mass: 114.8181
Density: 7.31
Melting point: 429.7485 K
Boiling point: 2345 K
Appearance: silvery lustrous gray
Source: Wikipedia
Block: p
Molar heat: 26.74
CPK color:#a67573
Electronic structure
Electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p1
Configuration (semantic): [Kr] 4d10 5s2 5p1
Shells: 2, 8, 18, 18, 3
Electronegativity (Pauling): 1.78
Electron affinity: 37.043
Ionization energies: 558.3, 1820.7, 2704, 5210
Periodic position
Group: 13
Period: 5
xpos: 13
ypos: 5
Spectral/Bohr images
Image
3D Model