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Zirconium Rhodium Comparison

Zirconium
Rhodium
Rhodium Zirconium comparison


Periodic Table
Symbol
Zr   
Rh   
Group Number
4   
14
9   
9
Period Number
5   
5   
Block
d block   
d block   
Element Family
Transition Metal   
Transition Metal   
CAS Number
7440677   
23
7440166   
99+
Space Group Name
P63/mmc   
Fm_ 3m   
Space Group Number
194.00   
5
225.00   
2
Facts
Interesting Facts
  • Zirconium metal can resist to weak acids.
  • Zirconium metal reacts with oxygen and nitrogen in the atmosphere.
  
  • 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
Martin Heinrich Klaproth   
William Hyde Wollaston   
Discovery
In 1789   
In 1804   
Abundance
  
  
Abundance In Universe
5 * 10-6 %   
13
6 * 10-8 %   
26
Abundance In Sun
~0.000004 %   
16
~0.0000002 %   
25
Abundance In Meteorites
0.00 %   
17
0.00 %   
36
Abundance In Earth's Crust
0.01 %   
14
0.00 %   
99+
Abundance In Oceans
0.00 %   
23
Not Available   
Abundance In Humans
0.00 %   
15
Not Available   
Uses
Uses & Benefits
  • As this metal does not absorb neutrons; It is used in nuclear power stations.
  • Its oxide is used in ultra strong ceramics. It is also used in manufacturing Crucibles.
  
  • 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
Aerospace Industry, Ammunition Industry   
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry   
Medical Uses
NA   
NA   
Other Uses
Alloys, Nuclear Research, Research Purposes   
Alloys   
Biological Properties
  
  
Toxicity
NA   
NA   
Present in Human Body
Yes   
No   
In Blood
0.01 Blood/mg dm-3   
21
Not Available   
In Bone
0.10 p.p.m.   
23
Not Available   
Physical Properties
Melting Point
1,852.00 °C   
15
1,966.00 °C   
12
Boiling Point
4,377.00 °C   
11
3,727.00 °C   
17
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Silvery White   
Luster
Lustrous   
Metallic   
Hardness
  
  
Mohs Hardness
5.00   
8
6.00   
6
Brinell Hardness
638.00 MPa   
19
980.00 MPa   
9
Vickers Hardness
820.00 MPa   
15
1,100.00 MPa   
9
Speed of Sound
3,800.00 m/s   
20
4,700.00 m/s   
15
Optical Properties
  
  
Reflectivity
Not Available   
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
Zr   
Rh   
Isotopes
  
  
Known Isotopes
24   
15
16   
23
Electronegativity
  
  
Pauling Electronegativity
1.33   
30
2.28   
3
Sanderson Electronegativity
0.90   
25
Not Available   
Allred Rochow Electronegativity
1.22   
26
1.45   
16
Allen Electronegativity
1.32   
34
1.56   
24
Electropositivity
  
  
Pauling Electropositivity
2.67   
24
1.72   
99+
Ionization Energies
  
  
1st Energy Level
640.10 kJ/mol   
99+
719.70 kJ/mol   
29
2nd Energy Level
1,270.00 kJ/mol   
99+
1,740.00 kJ/mol   
26
3rd Energy Level
2,218.00 kJ/mol   
99+
2,997.00 kJ/mol   
27
4th Energy Level
3,313.00 kJ/mol   
99+
Not Available   
5th Energy Level
7,752.00 kJ/mol   
10
Not Available   
6th Energy Level
9,500.00 kJ/mol   
15
Not Available   
Electrochemical Equivalent
0.85 g/amp-hr   
99+
1.28 g/amp-hr   
99+
Electron Work Function
4.05 eV   
26
4.98 eV   
6
Other Chemical Properties
Anti Corrosion, Flammable, Ionization, Radioactive Isotopes, Solubility   
Anti Corrosion, Ionization, Radioactive Isotopes   
Atomic Properties
Atomic Number
40   
99+
45   
99+
Electron Configuration
[Kr] 4d2 5s2   
[Kr] 4d8 5s1   
Crystal Structure
Hexagonal Close Packed (HCP)   
Face Centered Cubic (FCC)   
Crystal Lattice
HCP-Crystal-Structure-of-Zirconium.jpg#100   
FCC-Crystal-Structure-of-Rhodium.jpg#100   
Atom
  
  
Number of Protons
40   
99+
45   
99+
Number of Neutrons
51   
99+
58   
99+
Number of Electrons
40   
99+
45   
99+
Radius of an Atom
  
  
Atomic Radius
160.00 pm   
27
134.00 pm   
99+
Covalent Radius
175.00 pm   
23
142.00 pm   
99+
Van der Waals Radius
200.00 pm   
28
200.00 pm   
28
Atomic Weight
91.22 amu   
99+
102.91 amu   
99+
Atomic Volume
14.10 cm3/mol   
36
8.30 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Yttrium
  
Ruthenium
  
Next Element
Niobium
  
Palladium
  
Valence Electron Potential
80.00 (-eV)   
18
64.00 (-eV)   
22
Lattice Constant
323.20 pm   
99+
380.34 pm   
27
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   
Lattice C/A Ratio
1.59   
8
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
6.52 g/cm3   
99+
12.41 g/cm3   
28
Density When Liquid (at m.p.)
5.80 g/cm3   
99+
10.70 g/cm3   
14
Tensile Strength
330.00 MPa   
12
951.00 MPa   
5
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 2000 K
0.00 (Pa)   
21
0.02 (Pa)   
19
Elasticity properties
  
  
Shear Modulus
33.00 GPa   
20
150.00 GPa   
6
Bulk Modulus
91.10 GPa   
17
275.00 GPa   
5
Young's Modulus
88.00 GPa   
22
380.00 GPa   
5
Poisson Ratio
0.34   
10
0.26   
22
Other Mechanical Properties
Ductile, Malleable   
Malleable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
6.51   
99+
12.41   
20
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Conductor   
Resistivity
421.00 nΩ·m   
11
43.30 nΩ·m   
99+
Electrical Conductivity
0.02 106/cm Ω   
99+
0.21 106/cm Ω   
8
Electron Affinity
41.10 kJ/mol   
27
109.70 kJ/mol   
7
Thermal Properties
Specific Heat
0.27 J/(kg K)   
19
0.24 J/(kg K)   
22
Molar Heat Capacity
25.36 J/mol·K   
99+
24.98 J/mol·K   
99+
Thermal Conductivity
22.60 W/m·K   
99+
150.00 W/m·K   
9
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
5.70 µm/(m·K)   
99+
8.20 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Vaporization
581.60 kJ/mol   
9
495.40 kJ/mol   
12
Enthalpy of Fusion
20.90 kJ/mol   
11
21.76 kJ/mol   
10
Enthalpy of Atomization
598.00 kJ/mol   
10
556.50 kJ/mol   
12
Standard Molar Entropy
39.00 J/mol.K   
39
31.50 J/mol.K   
99+
Summary >>
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