Tungsten Tantalum Comparison
Periodic Table
Symbol
W
Ta
Group Number
6
12
5
13
Period Number
6
6
Block
d block
d block
Element Family
Transition Metal
Transition Metal
CAS Number
7440337
99+
7440257
99+
Space Group Name
Im_ 3m
Im_ 3m
Space Group Number
229.00
1
229.00
1
Facts
Interesting Facts
- Tungsten element has the second highest melting point.
- Pure tungsten can easily cut down with the help of hacksaw.
- Tantalum metal is known as corrosion resistance.
- Tantalum metal can easily fabricated and It is a good conductor of heat and electricity.
Sources
Earth's crust, Found in Minerals, Mining, Ores of Minerals
Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Not Available
Anders Gustaf Ekeberg
Discovery
In 1781
In 1802
Abundance
Abundance In Universe
5 * 10-8 %
27
8 * 10-9 %
31
Abundance In Sun
~0.0000004 %
23
~-9999 %
Abundance In Meteorites
0.00 %
39
0.00 %
99+
Abundance In Earth's Crust
0.00 %
39
0.00 %
37
Abundance In Oceans
0.00 %
18
0.00 %
31
Uses
Uses & Benefits
- Tungsten and its alloys are used in high-temperature applications like welding electrodes, high-temperature furnace, etc.
- Tungsten carbide is very hard and used in metal working, mining and petroleum industry.
- Tantalum metal is mainly used in the manufacturing of electron components. Its Oxide layer acts as an insulator.
- Tantalum metal is also used in surgical transplant like replacement of bone, skull plates and as a woven gauze.
Industrial Uses
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry
Electrical Industry, Electronic Industry
Medical Uses
NA
NA
Other Uses
Alloys
Alloys
Biological Properties
Toxicity
Non Toxic
Low Toxic
Present in Human Body
Yes
Yes
In Blood
0.00 Blood/mg dm-3
31
Not Available
In Bone
0.00 p.p.m.
35
0.03 p.p.m.
28
Physical Properties
Melting Point
3,410.00 °C
1
2,996.00 °C
4
Boiling Point
5,660.00 °C
1
5,425.00 °C
4
Appearance
Physical State
Solid
Solid
Color
Grayish White
Gray Blue
Luster
Lustrous
Metallic
Hardness
Mohs Hardness
7.50
2
6.50
5
Brinell Hardness
2,000.00 MPa
4
440.00 MPa
28
Vickers Hardness
3,430.00 MPa
1
870.00 MPa
12
Speed of Sound
4,620.00 m/s
16
3,400.00 m/s
22
Optical Properties
Reflectivity
62.00 %
13
78.00 %
6
Allotropes
No
No
α Allotropes
Not Available
Not Available
β Allotropes
Not Available
Not Available
γ Allotropes
Not Available
Not Available
Chemical Properties
Chemical Formula
W
Ta
Isotopes
Known Isotopes
33
6
31
8
Electronegativity
Pauling Electronegativity
2.36
2
1.50
27
Sanderson Electronegativity
0.98
23
Not Available
Allred Rochow Electronegativity
1.40
19
1.33
22
Allen Electronegativity
1.47
29
1.34
33
Electropositivity
Pauling Electropositivity
1.64
99+
2.50
27
Ionization Energies
1st Energy Level
770.00 kJ/mol
16
761.00 kJ/mol
18
2nd Energy Level
1,700.00 kJ/mol
29
1,500.00 kJ/mol
40
Electrochemical Equivalent
1.14 g/amp-hr
99+
1.35 g/amp-hr
99+
Electron Work Function
4.55 eV
13
4.25 eV
21
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility
Atomic Properties
Atomic Number
74
99+
73
99+
Electron Configuration
[Xe] 4f14 5d4 6s2
[Xe] 4f14 5d3 6s2
Crystal Structure
Body Centered Cubic (BCC)
Body Centered Cubic (BCC)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
BCC-Crystal-Structure-.jpg#100
Atom
Number of Protons
74
99+
73
99+
Number of Neutrons
110
27
108
28
Number of Electrons
74
99+
73
99+
Radius of an Atom
Atomic Radius
139.00 pm
39
146.00 pm
35
Covalent Radius
162.00 pm
29
170.00 pm
25
Van der Waals Radius
200.00 pm
28
200.00 pm
28
Atomic Weight
183.84 amu
37
180.95 amu
38
Atomic Volume
9.53 cm3/mol
99+
10.90 cm3/mol
99+
Adjacent Atomic Numbers
Valence Electron Potential
140.00 (-eV)
5
110.00 (-eV)
7
Lattice Constant
316.52 pm
99+
330.13 pm
99+
Lattice Angles
π/2, π/2, π/2
π/2, π/2, π/2
Lattice C/A Ratio
Not Available
Not Available
Mechanical Properties
Density
Density At Room Temperature
19.25 g/cm3
16
16.69 g/cm3
18
Density When Liquid (at m.p.)
17.60 g/cm3
5
15.00 g/cm3
9
Tensile Strength
370.00 MPa
10
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 2000 K
0.00 (Pa)
32
0.00 (Pa)
31
Elasticity properties
Shear Modulus
161.00 GPa
5
69.00 GPa
13
Bulk Modulus
310.00 GPa
4
200.00 GPa
8
Young's Modulus
411.00 GPa
4
186.00 GPa
13
Poisson Ratio
0.28
17
0.34
10
Other Mechanical Properties
Ductile, Malleable
Ductile
Magnetic Properties
Magnetic Characteristics
Specific Gravity
19.22
9
16.65
11
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Superconductor
Conductor
Resistivity
52.80 nΩ·m
99+
131.00 nΩ·m
25
Electrical Conductivity
0.19 106/cm Ω
10
0.08 106/cm Ω
27
Electron Affinity
78.60 kJ/mol
13
31.00 kJ/mol
29
Thermal Properties
Specific Heat
0.13 J/(kg K)
39
0.14 J/(kg K)
37
Molar Heat Capacity
24.27 J/mol·K
99+
25.36 J/mol·K
99+
Thermal Conductivity
173.00 W/m·K
7
57.50 W/m·K
27
Critical Temperature
Not Available
Not Available
Thermal Expansion
4.50 µm/(m·K)
99+
6.30 µm/(m·K)
99+
Enthalpy
Enthalpy of Vaporization
799.10 kJ/mol
1
753.10 kJ/mol
2
Enthalpy of Fusion
35.23 kJ/mol
1
31.40 kJ/mol
3
Enthalpy of Atomization
837.00 kJ/mol
1
782.00 kJ/mol
3
Standard Molar Entropy
32.60 J/mol.K
99+
41.50 J/mol.K
37
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