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Rhodium Tantalum Comparison

Rhodium
Tantalum
Tantalum Rhodium comparison


Periodic Table
Symbol
Rh   
Ta   
Group Number
9   
9
5   
13
Period Number
5   
6   
Block
d block   
d block   
Element Family
Transition Metal   
Transition Metal   
CAS Number
7440166   
99+
7440257   
99+
Space Group Name
Fm_ 3m   
Im_ 3m   
Space Group Number
225.00   
2
229.00   
1
Facts
Interesting Facts
  • 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.
  
  • 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 As a By-product, Found in Minerals, Mining   
Found in Minerals, Mining, Ores of Minerals   
History
  
  
Who Discovered
William Hyde Wollaston   
Anders Gustaf Ekeberg   
Discovery
In 1804   
In 1802   
Abundance
  
  
Abundance In Universe
6 * 10-8 %   
26
8 * 10-9 %   
31
Abundance In Sun
~0.0000002 %   
25
~-9999 %   
Abundance In Meteorites
0.00 %   
36
0.00 %   
99+
Abundance In Earth's Crust
0.00 %   
99+
0.00 %   
37
Abundance In Oceans
Not Available   
0.00 %   
31
Uses
Uses & Benefits
  • 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.
  
  • 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
NA   
Low Toxic   
Present in Human Body
No   
Yes   
In Bone
Not Available   
0.03 p.p.m.   
28
Physical Properties
Melting Point
1,966.00 °C   
12
2,996.00 °C   
4
Boiling Point
3,727.00 °C   
17
5,425.00 °C   
4
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Gray Blue   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
6.00   
6
6.50   
5
Brinell Hardness
980.00 MPa   
9
440.00 MPa   
28
Vickers Hardness
1,100.00 MPa   
9
870.00 MPa   
12
Speed of Sound
4,700.00 m/s   
15
3,400.00 m/s   
22
Optical Properties
  
  
Reflectivity
84.00 %   
4
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
Rh   
Ta   
Isotopes
  
  
Known Isotopes
16   
23
31   
8
Electronegativity
  
  
Pauling Electronegativity
2.28   
3
1.50   
27
Allred Rochow Electronegativity
1.45   
16
1.33   
22
Allen Electronegativity
1.56   
24
1.34   
33
Electropositivity
  
  
Pauling Electropositivity
1.72   
99+
2.50   
27
Ionization Energies
  
  
1st Energy Level
719.70 kJ/mol   
29
761.00 kJ/mol   
18
2nd Energy Level
1,740.00 kJ/mol   
26
1,500.00 kJ/mol   
40
3rd Energy Level
2,997.00 kJ/mol   
27
Not Available   
Electrochemical Equivalent
1.28 g/amp-hr   
99+
1.35 g/amp-hr   
99+
Electron Work Function
4.98 eV   
6
4.25 eV   
21
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes   
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Atomic Properties
Atomic Number
45   
99+
73   
99+
Electron Configuration
[Kr] 4d8 5s1   
[Xe] 4f14 5d3 6s2   
Crystal Structure
Face Centered Cubic (FCC)   
Body Centered Cubic (BCC)   
Crystal Lattice
FCC-Crystal-Structure-of-Rhodium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
45   
99+
73   
99+
Number of Neutrons
58   
99+
108   
28
Number of Electrons
45   
99+
73   
99+
Radius of an Atom
  
  
Atomic Radius
134.00 pm   
99+
146.00 pm   
35
Covalent Radius
142.00 pm   
99+
170.00 pm   
25
Van der Waals Radius
200.00 pm   
28
200.00 pm   
28
Atomic Weight
102.91 amu   
99+
180.95 amu   
38
Atomic Volume
8.30 cm3/mol   
99+
10.90 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Ruthenium
  
Hafnium
  
Next Element
Palladium
  
Tungsten
  
Valence Electron Potential
64.00 (-eV)   
22
110.00 (-eV)   
7
Lattice Constant
380.34 pm   
27
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
12.41 g/cm3   
28
16.69 g/cm3   
18
Density When Liquid (at m.p.)
10.70 g/cm3   
14
15.00 g/cm3   
9
Tensile Strength
951.00 MPa   
5
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 2000 K
0.02 (Pa)   
19
0.00 (Pa)   
31
Elasticity properties
  
  
Shear Modulus
150.00 GPa   
6
69.00 GPa   
13
Bulk Modulus
275.00 GPa   
5
200.00 GPa   
8
Young's Modulus
380.00 GPa   
5
186.00 GPa   
13
Poisson Ratio
0.26   
22
0.34   
10
Other Mechanical Properties
Malleable   
Ductile   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
12.41   
20
16.65   
11
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Conductor   
Resistivity
43.30 nΩ·m   
99+
131.00 nΩ·m   
25
Electrical Conductivity
0.21 106/cm Ω   
8
0.08 106/cm Ω   
27
Electron Affinity
109.70 kJ/mol   
7
31.00 kJ/mol   
29
Thermal Properties
Specific Heat
0.24 J/(kg K)   
22
0.14 J/(kg K)   
37
Molar Heat Capacity
24.98 J/mol·K   
99+
25.36 J/mol·K   
99+
Thermal Conductivity
150.00 W/m·K   
9
57.50 W/m·K   
27
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
8.20 µm/(m·K)   
99+
6.30 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Vaporization
495.40 kJ/mol   
12
753.10 kJ/mol   
2
Enthalpy of Fusion
21.76 kJ/mol   
10
31.40 kJ/mol   
3
Enthalpy of Atomization
556.50 kJ/mol   
12
782.00 kJ/mol   
3
Standard Molar Entropy
31.50 J/mol.K   
99+
41.50 J/mol.K   
37
Summary >>
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