Elements
42

Mo

Molybdenum

Molybdenum (Mo) is a silvery-white metal that has the atomic number 42 in the periodic table. It is a Transition metal and located in Group 6 of the periodic table. It has the symbol Mb.

Molybdenum does not occur naturally in the the earth’s crust instead bring bonded in ores. As a free element it is a silvery metal and has the sixth highest melting point of any element. It forms hard and stable carbides when bonded to carbon in alloys and has uses in the production of steel. Molybednite the ore from which it is extracted was initially mistaken for graphite due to its similar appearance. Molybdenum takes its name from the Ancient Greek ‘Molybdos’ which means lead. It is rumoured that Molybdenum was first alloyed with steel in Japan in the 14th Century but no evidence of this has been recovered. It was first discovered in 1754 by Bengt Andersson Qvist but only isolated in 1781 by Peter Jacob Hjelm who used carbon and linseed oil to isolate the element. It is located in Group 6 as a Transition metal. It has a melting point of 2623°c and a boiling point of 4639°c.

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FAQ's

What is the Melting Point for Molybdenum?

Molybdenum has a Melting Point of 2617°F, meaning at 2617°F it will turn to a liquid.

What is the Boiling Point for Molybdenum?

Molybdenum has a Boiling Point of 4612°F, meaning at 4612°F it will turn to a Gas.

What is the Electronegativity of Molybdenum?

Molybdenum's Electronegativty is 2.16. Electronegativity is a measure of how strongly atoms attract bonding electrons to themselves.

What is the Heat of Vaporization of Molybdenum?

Molybdenum has a Heat of Vaporization of 598 kJ/mol.

Uses

Its alloys are used in aircraft, missiles, and protective coatings in boiler plate.

Sources

Found in the minerals molybdenite (MoS2) and wulfenite (MoO4Pb).

42
Protons
42
Electrons
54
Neutrons

Mo

Element Symbol
Mo
Atomic Weight
95.95
Atomic Number
42
State
Solid
Melting Point
Unknown
2617
°C
Boiling Point
4612
Unknown
°C
Heat of Vaporization
598
Unknown
kJ/mol
Crystal Structure
Cubic: Body centered
Thermoconductivity
1.38
Unknown
W/cmK
Shells
2,8,18,13,1
Group
Transition Metal
Period
5
Block
D Block
Orbitals
[Kr] 4d5 5s1
Coefficient of Thermal Expansion
4.8 10^-6 K^-1
Covalent Radius
1.30 Å
Density at 293K
10.2 g/cm³
Electrical Conductivity
0.187 10^6/cm ohm
First Ionization Potential
7.0924 V
Second Ionization Potential
16.461 V
Third Ionization Potential
27.16 V
Ionic Radius
.59 (+6) Å
Oxydation States
(6),5,4,3,2
Lattice Parameter
3.1469 Å
Lattice Parameter 2
--
Lattice Parameter 3
--
Pronounced

meh-LIB-deh-nem

Discovered by

Carl Wilhelm Scheele

Discovery date

1778

Orbital configuration
2,8,18,13,1

Download the Periodic Table

Explore Other Transition Metals

63.546
29

Cu

Copper
91.224
40

Zr

Zirconium
190.23
76

Os

Osmium
186.207
75

Re

Rhenium
195.084
78

Pt

Platinum
50.942
23

V

Vanadium
107.868
47

Ag

Silver
285
112

Cn

Copernicium
44.956
21

Sc

Scandium
106.42
46

Pd

Palladium
178.49
72

Hf

Hafnium
269
106

Sg

Seaborgium
97
43

Tc

Technetium
200.592
80

Hg

Mercury
58.933
27

Co

Cobalt
101.07
44

Ru

Ruthenium
267
104

Rf

Rutherfordium
112.414
48

Cd

Cadmium
192.217
77

Ir

Iridium
65.38
30

Zn

Zinc
270
105

Db

Dubnium
92.906
41

Nb

Niobium
88.906
39

Y

Yttrium
183.84
74

W

Tungsten
54.938
25

Mn

Manganese
55.845
26

Fe

Iron
270
107

Bh

Bohrium
270
108

Hs

Hassium
180.948
73

Ta

Tantalum
58.693
28

Ni

Nickel
196.967
79

Au

Gold
102.905
45

Rh

Rhodium
47.867
22

Ti

Titanium
51.996
24

Cr

Chromium
Transition metal is any of various chemical elements that have valence electrons (electrons that can participate in the formation of chemical bond) in two shells instead of only one. They form group 3 (IIIb) through group 12 (IIb).
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