Tantalum vs Osmium
Periodic Table
Symbol
Ta
Os
Group Number
5
13
8
10
Period Number
6
6
Block
d block
d block
Element Family
Transition Metal
Transition Metal
CAS Number
7440257
99+
7440042
99+
Space Group Name
Im_ 3m
P63/mmc
Space Group Number
229.00
1
194.00
5
Facts
Interesting Facts
- Tantalum metal is known as corrosion resistance.
- Tantalum metal can easily fabricated and It is a good conductor of heat and electricity.
- Osmium metal does not oxidize in air unless it is heated.
- But if it heated den it forms Osmium Tetroxide, which is highly toxic.
Sources
Found in Minerals, Mining, Ores of Minerals
Found As a By-product, Found in Minerals, Mining
History
Who Discovered
Anders Gustaf Ekeberg
Smithson Tennant
Discovery
In 1802
In 1803
Abundance
Abundance In Universe
8 * 10-9 %
31
3 * 10-7 %
21
Abundance In Sun
~-9999 %
~0.0000002 %
25
Abundance In Meteorites
0.00 %
99+
0.00 %
28
Abundance In Earth's Crust
0.00 %
37
0.00 %
99+
Abundance In Oceans
0.00 %
31
Not Available
Uses
Uses & Benefits
- 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.
- Its has very limited uses and its alloys are very hard and are used in the manufacturing of pen tips, pivots, needles and electrical contacts.
- It is also used as industrial catalyst to speed up the chemical reaction.
Industrial Uses
Electrical Industry, Electronic Industry
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry
Medical Uses
NA
NA
Other Uses
Alloys
Alloys
Biological Properties
Toxicity
Low Toxic
Highly Toxic
Present in Human Body
Yes
No
In Bone
0.03 p.p.m.
28
Not Available
Physical Properties
Melting Point
2,996.00 °C
4
3,045.00 °C
3
Boiling Point
5,425.00 °C
4
5,027.00 °C
6
Appearance
Physical State
Solid
Solid
Color
Gray Blue
Silvery Bluish-Gray
Luster
Metallic
Metallic
Hardness
Mohs Hardness
6.50
5
7.00
3
Brinell Hardness
440.00 MPa
28
3,490.00 MPa
1
Vickers Hardness
870.00 MPa
12
Not Available
Speed of Sound
3,400.00 m/s
22
4,940.00 m/s
11
Optical Properties
Reflectivity
78.00 %
6
Not Available
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
Ta
Os
Isotopes
Known Isotopes
31
8
35
4
Electronegativity
Pauling Electronegativity
1.50
27
2.20
4
Allred Rochow Electronegativity
1.33
22
1.52
12
Allen Electronegativity
1.34
33
1.65
19
Electropositivity
Pauling Electropositivity
2.50
27
1.80
99+
Ionization Energies
1st Energy Level
761.00 kJ/mol
18
840.00 kJ/mol
12
2nd Energy Level
1,500.00 kJ/mol
40
1,309.80 kJ/mol
99+
3rd Energy Level
Not Available
1,600.00 kJ/mol
99+
Electrochemical Equivalent
1.35 g/amp-hr
99+
1.77 g/amp-hr
38
Electron Work Function
4.25 eV
21
4.83 eV
8
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility
Chemical Stability, Ionization, Solubility
Atomic Properties
Atomic Number
73
99+
76
40
Electron Configuration
[Xe] 4f14 5d3 6s2
[Xe] 4f14 5d6 6s2
Crystal Structure
Body Centered Cubic (BCC)
Hexagonal Close Packed (HCP)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
BCC-Crystal-Structure-.jpg#100
Atom
Number of Protons
73
99+
76
39
Number of Neutrons
108
28
114
25
Number of Electrons
73
99+
76
39
Radius of an Atom
Atomic Radius
146.00 pm
35
133.80 pm
99+
Covalent Radius
170.00 pm
25
Not Available
Van der Waals Radius
200.00 pm
28
216.00 pm
24
Atomic Weight
180.95 amu
38
190.23 amu
35
Atomic Volume
10.90 cm3/mol
99+
8.49 cm3/mol
99+
Adjacent Atomic Numbers
Valence Electron Potential
110.00 (-eV)
7
91.40 (-eV)
12
Lattice Constant
330.13 pm
99+
273.44 pm
99+
Lattice Angles
π/2, π/2, π/2
π/2, π/2, 2 π/3
Lattice C/A Ratio
Not Available
1.58
14
Mechanical Properties
Density
Density At Room Temperature
16.69 g/cm3
18
22.59 g/cm3
9
Density When Liquid (at m.p.)
15.00 g/cm3
9
20.00 g/cm3
1
Tensile Strength
Not Available
1,000.00 MPa
4
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 2000 K
0.00 (Pa)
31
0.00 (Pa)
28
Elasticity properties
Shear Modulus
69.00 GPa
13
222.00 GPa
1
Bulk Modulus
200.00 GPa
8
462.00 GPa
1
Young's Modulus
186.00 GPa
13
Not Available
Poisson Ratio
0.34
10
0.25
24
Other Mechanical Properties
Ductile
Ductile
Magnetic Properties
Magnetic Characteristics
Specific Gravity
16.65
11
22.57
2
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Conductor
Conductor
Resistivity
131.00 nΩ·m
25
81.20 nΩ·m
35
Electrical Conductivity
0.08 106/cm Ω
27
0.11 106/cm Ω
18
Electron Affinity
31.00 kJ/mol
29
106.10 kJ/mol
9
Thermal Properties
Specific Heat
0.14 J/(kg K)
37
0.13 J/(kg K)
39
Molar Heat Capacity
25.36 J/mol·K
99+
24.70 J/mol·K
99+
Thermal Conductivity
57.50 W/m·K
27
87.60 W/m·K
19
Critical Temperature
Not Available
Not Available
Thermal Expansion
6.30 µm/(m·K)
99+
5.10 µm/(m·K)
99+
Enthalpy
Enthalpy of Vaporization
753.10 kJ/mol
2
627.60 kJ/mol
7
Enthalpy of Fusion
31.40 kJ/mol
3
29.30 kJ/mol
4
Enthalpy of Atomization
782.00 kJ/mol
3
669.00 kJ/mol
6
Standard Molar Entropy
41.50 J/mol.K
37
32.60 J/mol.K
99+
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