42
Mo
Molybdenum
95.951
Basic Information
Bohr Model
Descriptive Numbers
Mass
Periodic Position
Classification
Abundance
Color
Atomic Radius
Temperature
Density
Heat
Speed of Sound
Electrical Resistance
Magnetic Properties
Elasticity
Hardness
Etymology
Discovery & Isolation
Production & Use
Radioactivity
Electron Affinity
Dipole Polarity
Lattice
Electron & Quantum
List of Compounds
Basic Information
Bohr Model
Static
Interactive
Descriptive Numbers
CAS Number
7439-98-7
CID Number
CID23932
DOT Number
3089
RTECS Number
RTECSQA4680000
Mendeleev Number
52
Pettifor Number
55
Space Group Number
229
Glawe Number
56
Mass
Atomic Mass
95.951 Da
Uncertainty
0.01
Periodic Position
X Position
6
Y Position
5
Period
5
Group
6
Classification
Block
d
Category
Transition Metal
Goldschmidt
Siderophile
Electrical Type
Conductive
Abundance
Urban Soil
0.0024 mg/kg
Seawater
1e-8 kg/L
Sun
0.0000023 mole ratio to silicon
Earth Crust
0.0000012 g
Solar System
0.0000026 mole ratio to silicon
Meteorites
0.00012 %
Color
Jmol
#54B5B5
Molcas Gv
#54B5B5
CPK
#FF1493
Atomic Radius
Empirical
145
Calculated
190
Batsanov
210
Rahm
244
Uff
305.2
Mm3
239
Alvarez
245
Covalent (Single Bound)
145
Covalent (Triple Bound)
113
Covalent (Cordero)
154
Covalent (Pyykko)
138
Covalent (Pyykko Double)
121
Covalent (Pyykko Triple)
113
Mendeleev
130
C12
139
Metallic
139
Temperature
Melting/Freeze (USE)
2896 °K
Melting/Freeze (WEL)
2896 °K
Melting/Freeze (CRC)
2896 °K
Melting/Freeze (LNG)
2895 °K
Boiling/Density (USE)
4912 °K
Boiling/Density (WEL)
4912 °K
Boiling/Density (CRC)
4912 °K
Boiling/Density (LNG)
5098 °K
Boiling/Density (Zhang)
4885 °K
Superconducting Point
0.92 °K
Density
STP
10.28 kg/cm³
Solid (WEL)
10280 kg/cm³
Solid (CRC)
10200 kg/cm³
Solid (LNG)
10280 kg/cm³
Liquid (CR2)
9330 kg/cm³
Heat
Molar Volume
9.38 cm³/mol
Atomic Volume
9.4 cm³
Heat Of Fusion USE
28 kJ/mol
Heat Of Fusion CRC
37.48 kJ/mol
Heat Of Fusion LNG
37.48 kJ/mol
Heat Of Fusion WEL
36 kJ/mol
Evaporation USE
590 kJ/mol
Evaporation LNG
617 kJ/mol
Evaporation WEL
600 kJ/mol
Evaporation Zhang
617 kJ/mol
Molar Heat
24.06 J/molK
Heat Capacity USE
0.251 J/gK
Heat Capacity CRC
24.06 J/gK
Heat Capacity LNG
24.13 J/gK
Heat Capacity WEL
24.1 J/gK
Thermal Expansion
0.0000048 1/K
Adiabatic Index
N/A
Speed of Sound
Longitudinal
6250 m/s
Transversal
3350 m/s
Extensional
5400 m/s
Electrical Resistance
80k
4.82 nΩm
273k
48.5 nΩm
293k
53.4 nΩm
298k
54.7 nΩm
300k
55.2 nΩm
500k
106 nΩm
Magnetic Properties
Order
paramanyetic
Susceptibility
1.2e-8 m3/kg
Elasticity
Shear Modulus
120 GPa
Bulk Modulus
230 GPa
Poisson Ratio
0.31 ν
Youngs Modulus
329 GPa
Hardness
Mohs
5.5
Brinell
1370–2500
Vickers
1400–2740
Etymology
Description
It is a silvery-white, hard, transition metal. It is chemically unreactive and unaffected by most acids. It oxidizes at high temperatures. It has seven natural isotopes and four radioisotopes. Of these four, Mo-93 is the most stable, with a half-life of 3500 years. Molybdenum is used in almost all high-strength steels. It is used in the nuclear field and acts as a catalyst in oil refining. It was discovered by Swedish Carl Wilhelm Scheele in 1778. The impurity metal state was obtained by Peter Jacob Hjelm in 1782. Its name comes from the Greek word "molybdos" meaning lead. Trace amounts of molybdenum are essential for all known life forms. It should be taken into consideration that all molybdenum compounds are highly toxic. Additionally, these compounds can cause serious birth defects.
Language Of Origin
Greek
Origin Of Word
molybdos, which means "lead" in Greek
Meaning
leaden
Symbol Origin
descriptive
Etymological Description
It comes from the Greek word molybdos meaning "lead".
Discovery & Isolation
Observed/Predicted By
W. Scheele
Observed/Discovery Year
1778
Discovery Location
Isolated Sample By
J. Helmet
Isolated Sample Year
1781
Production & Use
Sources
It is found in molybdenite (MoS2) and vulfenite (MoO4Pb) minerals.
Uses
Its alloys are used in protective coatings for aircraft, rockets and boiler plates.
Radioactivity
Half Life
Stable
Lifetime
Stable
Neutron Mass Absorption
0.0009
Neutron Cross Section
2.6
Electron Affinity
Electron Affinity (eV)
0.748
Electron Affinity (kJ/mol)
72.1
Electron Affinity (pauling)
2.16
Electron Affinity (allen)
8.71
Electron Affinity (ghosh)
0.1312672
Dipole Polarity
Accepted
87
Uncertainty
6
C6 GB
1030
Lattice
Constant Internal Default Radius
3.15
Constant
314.7, 314.7, 314.7
Strucutre
BCC
Angles
p/2, p/2, p/2
Electron & Quantum
Oxidation States
−4,−2,−1,0,1,2,3,4,5,6
Electron Configuration
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1 4d5
Quantum Number
Disappointed
Electron Configuration Semantic
[Kr] 4d5 5s1
Shells-0
2
Shells-1
8
Shells-2
18
Shells-3
13
Shells-4
1
Ionization Energies-0
684.3
Ionization Energies-1
1560
Ionization Energies-2
2618
Ionization Energies-3
4480
Ionization Energies-4
5257
Ionization Energies-5
6640.8
Ionization Energies-6
12125
Ionization Energies-7
13860
Ionization Energies-8
15835
Ionization Energies-9
17980
Ionization Energies-10
20190
Ionization Energies-11
22219
Ionization Energies-12
26930
Ionization Energies-13
29196
Ionization Energies-14
52490
Ionization Energies-15
55000
Ionization Energies-16
61400
Ionization Energies-17
67700
Ionization Energies-18
74000
Ionization Energies-19
80400
Ionization Energies-20
87000
Ionization Energies-21
93400
Ionization Energies-22
98420
Ionization Energies-23
104400
Ionization Energies-24
121900
Ionization Energies-25
127700
Ionization Energies-26
133800
Ionization Energies-27
139800
Ionization Energies-28
148100
Ionization Energies-29
154500
List of Compounds
1-10 of 80 compounds
| Formula | Names |
|---|---|
| Mo | molybdenum molybdenum metal |
| MoBr3 | molybdenum bromide molybdenum(III) bromide molybdenum tribromide tribromomolybdenum |
| Cl2Mo | molybdenum(II) chloride |
| MoCl3 | molybdenum(III) chloride molybdenum chloridemolybdenum trichloride trichloromolybdenum |
| Cl4Mo | molybdenum(IV) chloride |
| MoCl5 | molybdenum pentachloride molybdenum(V) chloride pentachloromolybdenum |
| F3Mo | molybdenum(III) fluoride |
| F4Mo | molybdenum(IV) fluoride |
| F5Mo | molybdenum(V) fluoride |
| MoF6 | molybdenum(vI) fluoride hexafluoromolybdenum molybdenum hexafluoride |
