Periodic Table Element Comparison: Compare Elements - Molybdenum vs Hafnium

Compare Molybdenum and Hafnium on the basis of their properties, attributes and periodic table facts. Compare elements on more than 90 properties. All the elements of similar categories show a lot of similarities and differences in their chemical, atomic, physical properties and uses. These similarities and dissimilarities should be known while we study periodic table elements. You can study the detailed comparison between Molybdenum vs Hafnium with most reliable information about their properties, attributes, facts, uses etc. You can compare Mo vs Hf on more than 90 properties like electronegativity , oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more. Molybdenum and Hafnium comparison table on more than 90 properties.

Molybdenum and Hafnium Comparison

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1
1
H
Hydrogen
1.008

Atomic #

Electronic Shell #

Symbol
Name
Atomic Weight
HGas
HgLiquid
CSolid
Metals
Metalloids
NonMetals
Alkali metals
Alkali earth metals
Lanthanoids
Transition metals
Post-transition metals
Other nonmetals
Halogens
Nobel gas
Actinoids
2
He
Helium
4.003
2
3
Li
Lithium
6.941
4
Be
Beryllium
9.012
5
B
Boron
10.811
6
C
Carbon
12.011
7
N
Nitrogen
14.007
8
O
Oxygen
15.999
9
F
Fluorine
18.998
10
Ne
Neon
20.180
3
11
Na
Sodium
22.990
12
Mg
Magnesium
24.305
13
Al
Aluminium
26.982
14
Si
Silicon
28.085
15
P
Phosphorus
30.974
16
S
Sulfur
32.065
17
Cl
Chlorine
35.453
18
Ar
Argon
39.948
4
19
K
Potassium
39.098
20
Ca
Calcium
40.078
21
Sc
Scandium
44.956
22
Ti
Titanium
47.867
23
V
Vanadium
50.941
24
Cr
Chromium
51.996
25
Mn
Manganese
54.938
26
Fe
Iron
55.845
27
Co
Cobalt
58.933
28
Ni
Nickel
58.693
29
Cu
Copper
63.546
30
Zn
Zinc
65.409
31
Ga
Gallium
69.723
32
Ge
Germanium
72.640
33
As
Arsenic
74.922
34
Se
Selenium
78.960
35
Br
Bromine
79.904
36
Kr
Krypton
83.798
5
37
Rb
Rubidium
85.468
38
Sr
Strontium
87.620
39
Y
Yttrium
88.906
40
Zr
Zirconium
91.224
41
Nb
Niobium
92.906
42
Mo
Molybdenum
95.940
43
Tc
Technetium
98
44
Ru
Ruthenium
101.070
45
Rh
Rhodium
102.906
46
Pd
Palladium
106.420
47
Ag
Silver
107.868
48
Cd
Cadmium
112.411
49
In
Indium
114.818
50
Sn
Tin
118.710
51
Sb
Antimony
121.760
52
Te
Tellurium
127.600
53
I
Iodine
126.904
54
Xe
Xenon
131.293
6
55
Cs
Cesium
132.905
56
Ba
Barium
137.327
57 - 71
La - Lu
Lanthanides
72
Hf
Hafnium
178.490
73
Ta
Tantalum
180.948
74
W
Tungsten
183.840
75
Re
Rhenium
186.207
76
Os
Osmium
190.230
77
Ir
Iridium
192.217
78
Pt
Platinum
195.078
79
Au
Gold
196.967
80
Hg
Mercury
200.590
81
Tl
Thallium
204.383
82
Pb
Lead
207.200
83
Bi
Bismuth
208.980
84
Po
Polonium
209
85
At
Astatine
210
86
Rn
Radon
222
7
87
Fr
Francium
223
88
Ra
Radium
226
89 - 103
Ac - Lr
Actinides
104
Rf
Rutherfordium
261
105
Db
Dubnium
262
106
Sg
Seaborgium
266
107
Bh
Bohrium
264
108
Hs
Hassium
269
109
Mt
Meitnerium
268
110
Ds
Darmstadtium
281
111
Rg
Roentgenium
272
112
Cn
Copernicium
285
113
Nh
Nihonium
284
114
Fl
Flerovium
289
115
Mc
Moscovium
288
116
Lv
Livermorium
292
117
Ts
Tennessine
294
118
Og
Oganesson
294
Lanthanides
57
La
Lanthanum
138.905
58
Ce
Cerium
140.116
59
Pr
Praseodymium
140.908
60
Nd
Neodymium
144.240
61
Pm
Promethium
145
62
Sm
Samarium
150.360
63
Eu
Europium
151.964
64
Gd
Gadolinium
157.250
65
Tb
Terbium
158.925
66
Dy
Dysprosium
162.500
67
Ho
Holmium
164.930
68
Er
Erbium
167.259
69
Tm
Thulium
168.934
70
Yb
Ytterbium
173.040
71
Lu
Lutetium
174.967
Actinides
89
Ac
Actinium
227
90
Th
Thorium
232.038
91
Pa
Protactinium
231.036
92
U
Uranium
238.029
93
Np
Neptunium
237
94
Pu
Plutonium
244
95
Am
Americium
243
96
Cm
Curium
247
97
Bk
Berkelium
247
98
Cf
Californium
251
99
Es
Einsteinium
252
100
Fm
Fermium
257
101
Md
Mendelevium
258
102
No
Nobelium
259
103
Lr
Lawrencium
262

Facts

NameMolybdenumHafnium
Atomic Number4272
Atomic SymbolMoHf
Atomic Weight95.94 178.49
Phase at STPSolid Solid
ColorGray Gray
Metallic ClassificationTransition Metal Transition Metal
Group in Periodic Tablegroup 6 group 4
Group Namechromium familytitanium family
Period in Periodic Tableperiod 5 period 6
Block in Periodic Tabled -blockd -block
Electronic Configuration[Kr] 4d5 5s1 [Xe] 4f14 5d2 6s2
Electronic Shell Structure (Electrons per shell)2, 8, 18, 13, 12, 8, 18, 32, 10, 2
Melting Point2896 K2506 K
Boiling Point4912 K4876 K
CAS NumberCAS7439-98-7 CAS7440-58-6
Neighborhood ElementsNeighborhood Elements of MolybdenumNeighborhood Elements of Hafnium

History

ParameterMolybdenumHafnium
HistoryThe element Molybdenum was discovered by W. Scheele in year 1778 in Sweden. Molybdenum derived its name from the Greek word molybdos meaning 'lead'.The element Hafnium was discovered by D. Coster and G. von Hevesy in year 1922 in Denmark. Hafnium derived its name from Hafnia, the New Latin name for Copenhagen.
DiscoveryW. Scheele (1778)D. Coster and G. von Hevesy (1922)
IsolatedJ. Hjelm (1781)D. Coster and G. von Hevesy (1922)

Presence: Abundance in Nature and Around Us

Parts per billion (ppb) by weight / by atoms (1ppb =10^-7 %)

PropertyMolybdenumHafnium
Abundance in Universe5 / 0.10.7 / 0.005
Abundance in Sun9 / 0.11 / 0.01
Abundance in Meteorites1200 / 250170 / 20
Abundance in Earth's Crust1100 / 2303300 / 380
Abundance in Oceans10 / 0.640.008 / 0.00028
Abundance in Humans100 / 7- / -

Crystal Structure and Atomic Structure

PropertyMolybdenumHafnium
Atomic Volume9.333 cm3/mol13.44 cm3/mol
Atomic Radius190 pm208 pm
Covalent Radius145 pm150 pm
Van der Waals Radius- -

Atomic Spectrum - Spectral Lines

Emission SpectrumEmission Spectrum of Molybdenum | SchoolMyKidsEmission Spectrum of Hafnium | SchoolMyKids
Absorption SpectrumAbsorption Spectrum of Molybdenum | SchoolMyKidsAbsorption Spectrum of Hafnium | SchoolMyKids
Lattice Constant314.7, 314.7, 314.7 pm319.64, 319.64, 505.11 pm
Lattice Angleπ/2, π/2, π/2π/2, π/2, 2 π/3
Space Group NameIm_ 3m P63/mmc
Space Group Number229 194
Crystal Structure

Body Centered Cubic

42 Mo Molybdenum - Crystal Structure | SchoolMyKids

Simple Hexagonal

72 Hf Hafnium - Crystal Structure | SchoolMyKids

Atomic and Orbital Properties

PropertyMolybdenumHafnium
Atomic Number4272
Number of Electrons (with no charge)4272
Number of Protons4272
Mass Number95.94178.49
Number of Neutrons54106
Shell structure (Electrons per energy level)2, 8, 18, 13, 12, 8, 18, 32, 10, 2
Electron Configuration[Kr] 4d5 5s1 [Xe] 4f14 5d2 6s2
Valence Electrons4d5 5s1 5d2 6s2
Oxidation State4, 64
Atomic Term Symbol (Quantum Numbers)7S3 3F2
Shell structure42 Mo Molybdenum Electron Shell Structure | SchoolMyKids72 Hf Hafnium Electron Shell Structure | SchoolMyKids

Isotopes and Nuclear Properties

Molybdenum has 6 stable naturally occuring isotopes while Hafnium has 5 stable naturally occuring isotopes.

ParameterMolybdenumHafnium
Known Isotopes83Mo, 84Mo, 85Mo, 86Mo, 87Mo, 88Mo, 89Mo, 90Mo, 91Mo, 92Mo, 93Mo, 94Mo, 95Mo, 96Mo, 97Mo, 98Mo, 99Mo, 100Mo, 101Mo, 102Mo, 103Mo, 104Mo, 105Mo, 106Mo, 107Mo, 108Mo, 109Mo, 110Mo, 111Mo, 112Mo, 113Mo, 114Mo, 115Mo153Hf, 154Hf, 155Hf, 156Hf, 157Hf, 158Hf, 159Hf, 160Hf, 161Hf, 162Hf, 163Hf, 164Hf, 165Hf, 166Hf, 167Hf, 168Hf, 169Hf, 170Hf, 171Hf, 172Hf, 173Hf, 174Hf, 175Hf, 176Hf, 177Hf, 178Hf, 179Hf, 180Hf, 181Hf, 182Hf, 183Hf, 184Hf, 185Hf, 186Hf, 187Hf, 188Hf
Stable IsotopesNaturally occurring stable isotopes:

92Mo, 94Mo, 95Mo, 96Mo, 97Mo, 98Mo

Naturally occurring stable isotopes:

176Hf, 177Hf, 178Hf, 179Hf, 180Hf

Neutron Cross Section 2.6 104
Neutron Mass Absorption 0.0009 0.02

Chemical Properties: Ionization Energies and electron affinity

PropertyMolybdenumHafnium
Valence or Valency6 4
Electronegativity2.16 Pauling Scale1.3 Pauling Scale
Electron Affinity71.9 kJ/mol0 kJ/mol
Ionization Energies
1st: 684.3 kJ/mol
2nd: 1560 kJ/mol
3rd: 2618 kJ/mol
4th: 4480 kJ/mol
5th: 5257 kJ/mol
6th: 6640.8 kJ/mol
7th: 12125 kJ/mol
8th: 13860 kJ/mol
9th: 15835 kJ/mol
10th: 17980 kJ/mol
11th: 20190 kJ/mol
12th: 22219 kJ/mol
13th: 26930 kJ/mol
14th: 29196 kJ/mol
15th: 52490 kJ/mol
16th: 55000 kJ/mol
17th: 61400 kJ/mol
18th: 67700 kJ/mol
19th: 74000 kJ/mol
20th: 80400 kJ/mol
21st: 87000 kJ/mol
22nd: 93400 kJ/mol
23rd: 98420 kJ/mol
24th: 104400 kJ/mol
25th: 121900 kJ/mol
26th: 127700 kJ/mol
27th: 133800 kJ/mol
28th: 139800 kJ/mol
29th: 148100 kJ/mol
30th: 154500 kJ/mol
1st: 658.5 kJ/mol
2nd: 1440 kJ/mol
3rd: 2250 kJ/mol
4th: 3216 kJ/mol

Physical Properties

PropertyMolybdenumHafnium
Density10.28 g/cm313.31 g/cm3
Molar Volume9.333 cm3/mol13.44 cm3/mol

Elastic Properties

Young Modulus329 78
Shear Modulus20 GPa30 GPa
Bulk Modulus230 GPa110 GPa
Poisson Ratio0.31 0.37

Hardness - Tests to Measure of Hardness of Element

Mohs Hardness5.5 MPa5.5 MPa
Vickers Hardness1530 MPa1760 MPa
Brinell Hardness1500 MPa1700 MPa

Electrical Properties

Electrical Conductivity20000000 S/m3300000 S/m
Resistivity 5e-8 m Ω3e-7 m Ω
Superconducting Point0.915 0.128

Heat and Conduction Properties

Thermal Conductivity139 W/(m K)23 W/(m K)
Thermal Expansion0.0000048 /K0.0000059 /K

Magnetic Properties

Magnetic TypeParamagnetic Paramagnetic
Curie Point- -
Mass Magnetic Susceptibility1.17e-8 m3/kg5.3e-9 m3/kg
Molar Magnetic Susceptibility1.122e-9 m3/mol9.46e-10 m3/mol
Volume Magnetic Susceptibility0.0001203 0.0000705

Optical Properties

Refractive Index- -

Acoustic Properties

Speed of Sound6190 m/s3010 m/s

Thermal Properties - Enthalpies and thermodynamics

PropertyMolybdenumHafnium
Melting Point2896 K2506 K
Boiling Point4912 K4876 K
Critical Temperature- -
Superconducting Point0.915 0.128

Enthalpies

Heat of Fusion36 kJ/mol25.5 kJ/mol
Heat of Vaporization600 kJ/mol630 kJ/mol
Heat of Combustion- -

Regulatory and Health - Health and Safety Parameters and Guidelines

ParameterMolybdenumHafnium
CAS NumberCAS7439-98-7 CAS7440-58-6
RTECS NumberRTECSQA4680000 RTECSMG4600000
DOT Hazard Class4.1 4.2
DOT Numbers3089 2545
EU Number- -
NFPA Fire Rating3 -
NFPA Health Rating1 -
NFPA Reactivity Rating0 -
NFPA Hazards- -
AutoIgnition Point- -
Flashpoint- -

Compare With Other Elements

Compare Molybdenum and Hafnium with other elements of the periodic table.

Compare Molybdenum with all Group 6 elements

Compare Molybdenum with all Period 5 elements

Compare Molybdenum with all Transition Metal elements

Compare Hafnium with all Group 4 elements

Compare Hafnium with all Period 6 elements

Compare Hafnium with all Transition Metal elements