Molybdenum

Symbol | Mo
Latin name | Molybdaneum
Atomic number | 42
Period | 5
Element category | Transition elements
Relative atomic mass | 95.94
Group | VI.B
Electronegativity | 1.8
Oxidation numbers | 2, 3, 4, 5, 6
Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d5 5s1
Density [g/cm3] | 10.22
State | Solid
Melting point [°C] | 2617
Boiling point [°C] | 4650
Atomic radius [pm] | 190
Covalent radius [pm] | 145
Thermal conductivity [W m-1K-1] | 138
Heat capacity [J K-1g-1] | 0.25
Discovery | 1785
Hardness [Mohs scale] | 5.5
Vickers hardness [MPa] | 1530
Brinell hardness [MPa] | 1500
Young's modulus [GPa] | 329
Electrical conductivity [S m-1] | 1.73 · 107
Shear modulus [GPa] | 20
1.st ionization energy [eV] | 7.0924
2.nd ionization energy [eV] | 16.461
3.rd ionization energy [eV] | 27.16
Stable isotopes | 7
Unstable isotopes | 13