Molybdenum

Symbol MoAtomic number 42
Atomic mass
95.94
 Thermal conductivity
1.38
Atomic radius
2.01
 Covalent radius
1.30
Density
10.2
 Atomic volume
9.4
Melting point
2890
 Oxidation states
6,5,4,3,2
Boiling point
4912
 Stable isotopes
7
Heat of vapor.
598.0
 Electronegativity
2.16
Heat of fusion
32.0
 First ionization
7.099
Specific heat
0.25
 Electrical conduct.
...
Electron configuration

General descriptionNuclear data
 Index

Periodic Table

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Molybdenum

Molybdenum is a metal which has important use as a constituent of alloy steels.

It is found principally in the mineral molybdenite, MoS2, of which there is an enormous deposit near Climax, Colorado. The mineral forms in shiny black plates, similar to graphite in appearance. Other mineral forms are Powellite and Wulfenite.

Molybdenum is an exception to the general order of filling of electron orbitals like chromium in the previous period of the same column of the periodic table. It fills five 4d states before it fills the second 5s state. Just those levels outside a krypton core are shown.


Atomic dataNuclear data
 Index

Periodic Table

Chemistry concepts

Reference
Pauling
Ch. 29
 
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Molybdenum Nuclear Data

Z
A
Atomic
Mass (u)
Nuclear
Mass(GeV/c2
Binding
Energy(MeV)
Spin
Natural
Abund.
Half-life
Decay
Q
MeV
42
92
91.906809
85.5899
796.52
0
0.1484
stable
...
...
42
93
92.906813
86.5214
804.59
5/2
...
3.5 ky
EC
0.41
42
94
93.905085
87.4513
814.27
0
0.0925
stable
...
...
42
95
94.905841
88.3835
821.64
5/2
0.1592
stable
...
...
42
96
95.904679
89.3139
830.79
0
0.1668
stable
...
...
42
97
96.906020
90.2467
837.61
5/2
0.0955
stable
...
...
42
98
97.905407
91.1776
846.26
0
0.2413
stable
...
...
42
99
98.907711
92.1112
852.18
1/2
...
2.75 d
b-
1.36
42
100
99.907476
93.0425
860.47
0
0.0963
stable
...
...
Atomic data
Index

Periodic Table

Chemistry concepts

Reference
Rohlf
 
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