Mo - Molybdenum

This transition metal was discovered by Scheele in 1778 and extracted in metallic form in 1783 by P. H. Hjelm in Sweden.

Atomic number - 42 Density g/mL 10 .2
Atomic weight u 95 .94 Melting point K 2890
Bonding radius A 1 .3 Boiling point K 4912
Atomic radius A 2 .01 Heat of vaporization kJ/mol 598
Ionization Potential V 7 .099 Heat of fusion kJ/mol 32
Electronegativity - 2 .16 Specific heat J/gK 0 .25
The oxide is a strong acid.
Crystal are body centered cubic.

Electron config. : [Kr] 4d5 5s1

Isotopes of Mo: Click mass number for decay process, product for element page.


086
19.6 sec
EC,4.800 MeV
Nb-86
85.930219
087
14.5 sec
EC/ECp,6.490
Nb-87/Zr-86
86.927331
088
8.0 min
EC,3.720 MeV
Nb-88
87.921952
089
2.04 min
EC,5.580 MeV
Nb-89
88.919479
090
5.56 hr
EC,2.489 MeV
Nb-90
89.913936
091
15.49 min
EC,4.434 MeV
Nb-91
90.911749
092 14.84%

Stable

91.906809
093
4.0E+3 yr
EC,2.893 MeV
Nb-93
92.906812
094 9.25%

Stable

93.905086
095 15.92%

Stable

94.905841
096 16.68%

Stable

95.904678
097 9.55%

Stable

96.906020
098 24.13%

Stable

97.905406
099
65.94 hr
B-,1.357 MeV
Tc-99
98.907710
100 9.63%
1.2E19 yr
2B-,3.034 MeV
Ru-100
99.907476
101
14.61 min
B-,2.824 MeV
Tc-101
100.91034
102
11.3 min
B-,1.010 MeV
Tc-102
101.91029
103
67.5 sec
B-,3.750 MeV
Tc-103
102.91320
104
60 sec
B-,2.160 MeV
Tc-104
103.91376
105
35.6 sec
B-,4.950 MeV
Tc-105
104.91697
106
8.4 sec
B-,3.520 MeV
Tc-106
105.91813
107
3.5 sec
B-,6.160 MeV
Tc-107
106.92169
108
1.09 sec
B-,4.640 MeV
Tc-108
107.92345
109
0.53 sec
B-,7.500 MeV
Tc-109
108.92764
110
0.30 sec
B-,5.700 MeV
Tc-110
109.92946
MASS abund.
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass