Periodic Table Element Comparison: Compare Elements - Molybdenum vs Tantalum

Compare Molybdenum and Tantalum 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 Tantalum with most reliable information about their properties, attributes, facts, uses etc. You can compare Mo vs Ta on more than 90 properties like electronegativity , oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more. Molybdenum and Tantalum comparison table on more than 90 properties.

Molybdenum and Tantalum 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

NameMolybdenumTantalum
Atomic Number4273
Atomic SymbolMoTa
Atomic Weight95.94 180.9479
Phase at STPSolid Solid
ColorGray Gray
Metallic ClassificationTransition Metal Transition Metal
Group in Periodic Tablegroup 6 group 5
Group Namechromium familyvanadium family
Period in Periodic Tableperiod 5 period 6
Block in Periodic Tabled -blockd -block
Electronic Configuration[Kr] 4d5 5s1 [Xe] 4f14 5d3 6s2
Electronic Shell Structure (Electrons per shell)2, 8, 18, 13, 12, 8, 18, 32, 11, 2
Melting Point2896 K3290 K
Boiling Point4912 K5731 K
CAS NumberCAS7439-98-7 CAS7440-25-7
Neighborhood ElementsNeighborhood Elements of MolybdenumNeighborhood Elements of Tantalum

History

ParameterMolybdenumTantalum
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 Tantalum was discovered by G. Ekeberg in year 1802 in Sweden. Tantalum derived its name from King Tantalus, father of Niobe from Greek mythology.
DiscoveryW. Scheele (1778)G. Ekeberg (1802)
IsolatedJ. Hjelm (1781) ()

Presence: Abundance in Nature and Around Us

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

PropertyMolybdenumTantalum
Abundance in Universe5 / 0.10.08 / 0.0006
Abundance in Sun9 / 0.1- / -
Abundance in Meteorites1200 / 25020 / 2
Abundance in Earth's Crust1100 / 2301700 / 190
Abundance in Oceans10 / 0.640.002 / 0.000068
Abundance in Humans100 / 7- / -

Crystal Structure and Atomic Structure

PropertyMolybdenumTantalum
Atomic Volume9.333 cm3/mol10.85 cm3/mol
Atomic Radius190 pm200 pm
Covalent Radius145 pm138 pm
Van der Waals Radius- -

Atomic Spectrum - Spectral Lines

Emission SpectrumEmission Spectrum of Molybdenum | SchoolMyKidsEmission Spectrum of Tantalum | SchoolMyKids
Absorption SpectrumAbsorption Spectrum of Molybdenum | SchoolMyKidsAbsorption Spectrum of Tantalum | SchoolMyKids
Lattice Constant314.7, 314.7, 314.7 pm330.13, 330.13, 330.13 pm
Lattice Angleπ/2, π/2, π/2π/2, π/2, π/2
Space Group NameIm_ 3m Im_ 3m
Space Group Number229 229
Crystal Structure

Body Centered Cubic

42 Mo Molybdenum - Crystal Structure | SchoolMyKids

Body Centered Cubic

73 Ta Tantalum - Crystal Structure | SchoolMyKids

Atomic and Orbital Properties

PropertyMolybdenumTantalum
Atomic Number4273
Number of Electrons (with no charge)4273
Number of Protons4273
Mass Number95.94180.9479
Number of Neutrons54108
Shell structure (Electrons per energy level)2, 8, 18, 13, 12, 8, 18, 32, 11, 2
Electron Configuration[Kr] 4d5 5s1 [Xe] 4f14 5d3 6s2
Valence Electrons4d5 5s1 5d3 6s2
Oxidation State4, 65
Atomic Term Symbol (Quantum Numbers)7S3 4F3/2
Shell structure42 Mo Molybdenum Electron Shell Structure | SchoolMyKids73 Ta Tantalum Electron Shell Structure | SchoolMyKids

Isotopes and Nuclear Properties

Molybdenum has 6 stable naturally occuring isotopes while Tantalum has 1 stable naturally occuring isotopes.

ParameterMolybdenumTantalum
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, 115Mo155Ta, 156Ta, 157Ta, 158Ta, 159Ta, 160Ta, 161Ta, 162Ta, 163Ta, 164Ta, 165Ta, 166Ta, 167Ta, 168Ta, 169Ta, 170Ta, 171Ta, 172Ta, 173Ta, 174Ta, 175Ta, 176Ta, 177Ta, 178Ta, 179Ta, 180Ta, 181Ta, 182Ta, 183Ta, 184Ta, 185Ta, 186Ta, 187Ta, 188Ta, 189Ta, 190Ta
Stable IsotopesNaturally occurring stable isotopes:

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

Naturally occurring stable isotopes:

181Ta

Neutron Cross Section 2.6 20.5
Neutron Mass Absorption 0.0009 0.0041

Chemical Properties: Ionization Energies and electron affinity

PropertyMolybdenumTantalum
Valence or Valency6 5
Electronegativity2.16 Pauling Scale1.5 Pauling Scale
Electron Affinity71.9 kJ/mol31 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: 761 kJ/mol
2nd: 1500 kJ/mol

Physical Properties

PropertyMolybdenumTantalum
Density10.28 g/cm316.65 g/cm3
Molar Volume9.333 cm3/mol10.85 cm3/mol

Elastic Properties

Young Modulus329 186
Shear Modulus20 GPa69 GPa
Bulk Modulus230 GPa200 GPa
Poisson Ratio0.31 0.34

Hardness - Tests to Measure of Hardness of Element

Mohs Hardness5.5 MPa6.5 MPa
Vickers Hardness1530 MPa873 MPa
Brinell Hardness1500 MPa800 MPa

Electrical Properties

Electrical Conductivity20000000 S/m7700000 S/m
Resistivity 5e-8 m Ω1.3e-7 m Ω
Superconducting Point0.915 4.47

Heat and Conduction Properties

Thermal Conductivity139 W/(m K)57 W/(m K)
Thermal Expansion0.0000048 /K0.0000063 /K

Magnetic Properties

Magnetic TypeParamagnetic Paramagnetic
Curie Point- -
Mass Magnetic Susceptibility1.17e-8 m3/kg1.07e-8 m3/kg
Molar Magnetic Susceptibility1.122e-9 m3/mol1.936e-9 m3/mol
Volume Magnetic Susceptibility0.0001203 0.0001782

Optical Properties

Refractive Index- -

Acoustic Properties

Speed of Sound6190 m/s3614.2 m/s

Thermal Properties - Enthalpies and thermodynamics

PropertyMolybdenumTantalum
Melting Point2896 K3290 K
Boiling Point4912 K5731 K
Critical Temperature- -
Superconducting Point0.915 4.47

Enthalpies

Heat of Fusion36 kJ/mol36 kJ/mol
Heat of Vaporization600 kJ/mol735 kJ/mol
Heat of Combustion- -

Regulatory and Health - Health and Safety Parameters and Guidelines

ParameterMolybdenumTantalum
CAS NumberCAS7439-98-7 CAS7440-25-7
RTECS NumberRTECSQA4680000 RTECSWW5505000
DOT Hazard Class4.1 4.1
DOT Numbers3089 3089
EU Number- -
NFPA Fire Rating3 -
NFPA Health Rating1 -
NFPA Reactivity Rating0 -
NFPA Hazards- -
AutoIgnition Point- -
Flashpoint- -

Compare With Other Elements

Compare Molybdenum and Tantalum 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 Tantalum with all Group 5 elements

Compare Tantalum with all Period 6 elements

Compare Tantalum with all Transition Metal elements