Molybdenum (Mo) properties

Atomic mass, symbol and atomic number

molybdenum is a naturally occurring element with the element symbol Mo and the ordinal number 42. In the periodic table it stands with an atomic mass of 95.94 u in the 6th subgroup. The chemical element discovered by Peter Jacob Hjelm in 1782 is not radioactive and is in a solid state of aggregation at room temperature.

Profile: Molybdenum (English: Molybdenum)

Chemical element:molybdenum
Atomic number:42
Group:Chrome group
Series:Transition metals
Appearance:silver to greyish
explorers:Peter Jacob Hjelm
Year of discovery:1782
Atomic properties
Atomic mass:95.94 u
Atomic radius:145 pm
Covalent radius:154 pm
Van der Waals radius:unknown
Electron configuration:Kr 4d5 5s1
ionization:684.3 kJ / mol
Physical Properties
Physical state:firmly
Crystal structure:cubic
molar volume:9,38 · 10-6 m3/ mol
Mohs hardness:5,5
Melting point:2623 ° C
Boiling point:4612 ° C
Heat of fusion:36 kJ / mol
Heat of vaporization:???
Thermal conductivity:139 W
Chemical properties

Did you know that ...

  • Molybdenum in the human body is considered an essential trace element?
  • The term molybdenum comes from Greek and actually means "lead"?
  • Molybdenum used in conjunction with iron as a steel alloy?