SymbolCd
Latin nameCadmium
Atomic number48
Period5
Element categoryTransition elements
Relative atomic mass112.411
GroupII.B
Electronegativity
1.7
Oxidation numbers
2
Electron configuration
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2
Density [g/cm3]
8.65
State
Solid
Melting point [°C]
321.108
Boiling point [°C]
765
Atomic radius [pm]
161
Covalent radius [pm]
148
Thermal conductivity [W m-1K-1]
96.8
Heat capacity [J K-1g-1]
0.233
Discovery
1817
Hardness [Mohs scale]
2.0
Brinell hardness [MPa]
203
Young's modulus [GPa]
50
Electrical conductivity [S m-1]
4.4 · 107
Shear modulus [GPa]
19
1.st ionization energy [eV]
8.9937
2.nd ionization energy [eV]
16.908
3.rd ionization energy [eV]
37.48
Stable isotopes
5
Unstable isotopes
14