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49 - Indium post-transition metal

Discovered by Ferdinand Reich in 1863

Indium

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.
Shell Electrons Orbitals
1 2 2 in 1s
2 8 2 in 2s + 6 in 2p
3 18 2 in 3s + 6 in 3p + 10 in 3d
4 18 2 in 4s + 6 in 4p + 10 in 4d
5 3 2 in 5s + 1 in 5p
IndiumIn Electron 1 Electron 2 Electron 1 Electron 2 Electron 3 Electron 4 Electron 5 Electron 6 Electron 7 Electron 8 Electron 1 Electron 2 Electron 3 Electron 4 Electron 5 Electron 6 Electron 7 Electron 8 Electron 9 Electron 10 Electron 11 Electron 12 Electron 13 Electron 14 Electron 15 Electron 16 Electron 17 Electron 18 Electron 1 Electron 2 Electron 3 Electron 4 Electron 5 Electron 6 Electron 7 Electron 8 Electron 9 Electron 10 Electron 11 Electron 12 Electron 13 Electron 14 Electron 15 Electron 16 Electron 17 Electron 18 Electron 1 Electron 2 Electron 3
114.82  u Atomic Mass
2  Å Atomic Radius
2345  K Boiling Point
1.42  Å Covalent Radius
7.31  g/cm³ Density
37.04 Electron Affinity
1.78 Electronegativity
5.79  eV First Ionization Energy
429.91  K Melting Point
5 Number of Shells
3 Electron Valency
49 Atomic Number
2, 8, 18, 18, 3 Electron Shell Occupations
0.23  J/(g K) Specific Heat