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Tantalum Rhodium Comparison

Tantalum
Rhodium
Rhodium Tantalum comparison


Periodic Table
Symbol
Ta   
Rh   
Group Number
5   
13
9   
9
Period Number
6   
5   
Block
d block   
d block   
Element Family
Transition Metal   
Transition Metal   
CAS Number
7440257   
99+
7440166   
99+
Space Group Name
Im_ 3m   
Fm_ 3m   
Space Group Number
229.00   
1
225.00   
2
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.
  
  • Rhodium is the rarest element out of all non-radioactive metals on the earth .
  • Rhodium is one of the most durable and hard metal, which also have high reflectance.
  
Sources
Found in Minerals, Mining, Ores of Minerals   
Earth's crust, Found As a By-product, Found in Minerals, Mining   
History
  
  
Who Discovered
Anders Gustaf Ekeberg   
William Hyde Wollaston   
Discovery
In 1802   
In 1804   
Abundance
  
  
Abundance In Universe
8 * 10-9 %   
31
6 * 10-8 %   
26
Abundance In Sun
~-9999 %   
~0.0000002 %   
25
Abundance In Meteorites
0.00 %   
99+
0.00 %   
36
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.
  
  • Rhodium metal is mainly used in catalytic converters for cars as it reduces nitrogen oxides in exhaust gases.
  • It is used as an industrial catalyst for nitric acid, acetic acid, hydrogenation reaction, etc.
  
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   
NA   
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
1,966.00 °C   
12
Boiling Point
5,425.00 °C   
4
3,727.00 °C   
17
Appearance
  
  
Physical State
Solid   
Solid   
Color
Gray Blue   
Silvery White   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
6.50   
5
6.00   
6
Brinell Hardness
440.00 MPa   
28
980.00 MPa   
9
Vickers Hardness
870.00 MPa   
12
1,100.00 MPa   
9
Speed of Sound
3,400.00 m/s   
22
4,700.00 m/s   
15
Optical Properties
  
  
Reflectivity
78.00 %   
6
84.00 %   
4
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   
Rh   
Isotopes
  
  
Known Isotopes
31   
8
16   
23
Electronegativity
  
  
Pauling Electronegativity
1.50   
27
2.28   
3
Allred Rochow Electronegativity
1.33   
22
1.45   
16
Allen Electronegativity
1.34   
33
1.56   
24
Electropositivity
  
  
Pauling Electropositivity
2.50   
27
1.72   
99+
Ionization Energies
  
  
1st Energy Level
761.00 kJ/mol   
18
719.70 kJ/mol   
29
2nd Energy Level
1,500.00 kJ/mol   
40
1,740.00 kJ/mol   
26
3rd Energy Level
Not Available   
2,997.00 kJ/mol   
27
Electrochemical Equivalent
1.35 g/amp-hr   
99+
1.28 g/amp-hr   
99+
Electron Work Function
4.25 eV   
21
4.98 eV   
6
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Anti Corrosion, Ionization, Radioactive Isotopes   
Atomic Properties
Atomic Number
73   
99+
45   
99+
Electron Configuration
[Xe] 4f14 5d3 6s2   
[Kr] 4d8 5s1   
Crystal Structure
Body Centered Cubic (BCC)   
Face Centered Cubic (FCC)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
FCC-Crystal-Structure-of-Rhodium.jpg#100   
Atom
  
  
Number of Protons
73   
99+
45   
99+
Number of Neutrons
108   
28
58   
99+
Number of Electrons
73   
99+
45   
99+
Radius of an Atom
  
  
Atomic Radius
146.00 pm   
35
134.00 pm   
99+
Covalent Radius
170.00 pm   
25
142.00 pm   
99+
Van der Waals Radius
200.00 pm   
28
200.00 pm   
28
Atomic Weight
180.95 amu   
38
102.91 amu   
99+
Atomic Volume
10.90 cm3/mol   
99+
8.30 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Hafnium
  
Ruthenium
  
Next Element
Tungsten
  
Palladium
  
Valence Electron Potential
110.00 (-eV)   
7
64.00 (-eV)   
22
Lattice Constant
330.13 pm   
99+
380.34 pm   
27
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
16.69 g/cm3   
18
12.41 g/cm3   
28
Density When Liquid (at m.p.)
15.00 g/cm3   
9
10.70 g/cm3   
14
Tensile Strength
Not Available   
951.00 MPa   
5
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 2000 K
0.00 (Pa)   
31
0.02 (Pa)   
19
Elasticity properties
  
  
Shear Modulus
69.00 GPa   
13
150.00 GPa   
6
Bulk Modulus
200.00 GPa   
8
275.00 GPa   
5
Young's Modulus
186.00 GPa   
13
380.00 GPa   
5
Poisson Ratio
0.34   
10
0.26   
22
Other Mechanical Properties
Ductile   
Malleable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
16.65   
11
12.41   
20
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Conductor   
Resistivity
131.00 nΩ·m   
25
43.30 nΩ·m   
99+
Electrical Conductivity
0.08 106/cm Ω   
27
0.21 106/cm Ω   
8
Electron Affinity
31.00 kJ/mol   
29
109.70 kJ/mol   
7
Thermal Properties
Specific Heat
0.14 J/(kg K)   
37
0.24 J/(kg K)   
22
Molar Heat Capacity
25.36 J/mol·K   
99+
24.98 J/mol·K   
99+
Thermal Conductivity
57.50 W/m·K   
27
150.00 W/m·K   
9
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
6.30 µm/(m·K)   
99+
8.20 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Vaporization
753.10 kJ/mol   
2
495.40 kJ/mol   
12
Enthalpy of Fusion
31.40 kJ/mol   
3
21.76 kJ/mol   
10
Enthalpy of Atomization
782.00 kJ/mol   
3
556.50 kJ/mol   
12
Standard Molar Entropy
41.50 J/mol.K   
37
31.50 J/mol.K   
99+
Summary >>
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