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Rhodium vs Zirconium

Rhodium
Zirconium
Zirconium vs Rhodium


Periodic Table
Symbol
Rh  
Zr  
Group Number
9  
9
4  
14
Period Number
5  
5  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
7440166  
99+
7440677  
23
Space Group Name
Fm_ 3m  
P63/mmc  
Space Group Number
225.00  
3
194.00  
7
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.
  
  • Zirconium metal can resist to weak acids.
  • Zirconium metal reacts with oxygen and nitrogen in the atmosphere.
  
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  
Martin Heinrich Klaproth  
Discovery
In 1804  
In 1789  
Abundance
  
  
Abundance In Universe
0.00 %  
27
0.00 %  
14
Abundance In Sun
0.00 %  
25
0.00 %  
16
Abundance In Meteorites
0.00 %  
36
0.00 %  
17
Abundance In Earth's Crust
0.00 %  
99+
0.01 %  
14
Abundance In Oceans
-  
0.00 %  
23
Abundance In Humans
0.00 %  
24
0.00 %  
18
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.
  
  • 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.
  
Industrial Uses
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry  
Aerospace Industry, Ammunition Industry  
Medical Uses
-  
-  
Other Uses
Alloys  
Alloys, Nuclear Research, Research Purposes  
Biological Properties
  
  
Toxicity
-  
-  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
37
0.01 Blood/mg dm-3  
21
In Bone
0.00 p.p.m.  
99+
0.10 p.p.m.  
28
Physical
Melting Point
1,966.00 °C  
12
1,852.00 °C  
15
Boiling Point
3,727.00 °C  
17
4,377.00 °C  
11
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silvery White  
Luster
Metallic  
Lustrous  
Hardness
  
  
Mohs Hardness
6.00  
6
5.00  
8
Brinell Hardness
980.00 MPa  
10
638.00 MPa  
21
Vickers Hardness
1,100.00 MPa  
15
820.00 MPa  
22
Speed of Sound
4,700.00 m/s  
19
3,800.00 m/s  
27
Optical Properties
  
  
Refractive Index
2.40  
7
2.15  
10
Reflectivity
84.00 %  
5
70.00 %  
13
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Rh  
Zr  
Isotopes
  
  
Known Isotopes
16  
23
24  
15
Electronegativity
  
  
Pauling Electronegativity
2.28  
4
1.33  
31
Sanderson Electronegativity
2.28  
5
0.90  
99+
Allred Rochow Electronegativity
1.45  
17
1.22  
27
Mulliken-Jaffe Electronegativity
2.28  
4
1.33  
32
Allen Electronegativity
1.56  
27
1.32  
39
Electropositivity
  
  
Pauling Electropositivity
1.72  
99+
2.67  
24
Ionization Energies
  
  
1st Energy Level
719.70 kJ/mol  
29
640.10 kJ/mol  
99+
2nd Energy Level
1,740.00 kJ/mol  
27
1,270.00 kJ/mol  
99+
3rd Energy Level
2,997.00 kJ/mol  
27
2,218.00 kJ/mol  
99+
4th Energy Level
7,197.00 kJ/mol  
11
3,313.00 kJ/mol  
99+
5th Energy Level
7,197.00 kJ/mol  
26
7,752.00 kJ/mol  
16
6th Energy Level
7,197.00 kJ/mol  
40
9,500.00 kJ/mol  
21
7th Energy level
7,197.00 kJ/mol  
35
6,400.00 kJ/mol  
99+
8th Energy Level
3,480.00 kJ/mol  
99+
6,400.00 kJ/mol  
99+
9th Energy Level
5,090.00 kJ/mol  
99+
6,400.00 kJ/mol  
40
10th Energy Level
7,197.00 kJ/mol  
33
5,730.00 kJ/mol  
99+
11th Energy Level
7,197.00 kJ/mol  
32
6,406.00 kJ/mol  
99+
12th Energy Level
7,190.00 kJ/mol  
99+
6,400.00 kJ/mol  
99+
13th Energy Level
7,190.00 kJ/mol  
27
6,400.00 kJ/mol  
36
14th Energy Level
7,197.00 kJ/mol  
21
640.00 kJ/mol  
99+
15th Energy Level
71,900.00 kJ/mol  
23
64,000.00 kJ/mol  
36
16th Energy Level
71,900.00 kJ/mol  
18
64,000.00 kJ/mol  
27
17th Energy Level
719.70 kJ/mol  
39
640.10 kJ/mol  
99+
18th Energy Level
7,197.00 kJ/mol  
29
6,400.00 kJ/mol  
38
19th Energy Level
719.70 kJ/mol  
36
640.00 kJ/mol  
99+
20th Energy Level
719.00 kJ/mol  
30
640.00 kJ/mol  
39
21st Energy Level
719.70 kJ/mol  
99+
640.10 kJ/mol  
99+
22nd Energy Level
719.00 kJ/mol  
24
640.00 kJ/mol  
33
23rd Energy Level
719.70 kJ/mol  
99+
640.10 kJ/mol  
99+
24th Energy Level
719.70 kJ/mol  
23
640.00 kJ/mol  
35
25th Energy Level
719.00 kJ/mol  
23
640.10 kJ/mol  
37
26th Energy Level
719.70 kJ/mol  
23
640.10 kJ/mol  
36
27th Energy Level
719.70 kJ/mol  
22
640.10 kJ/mol  
38
28th Energy Level
719.70 kJ/mol  
28
640.10 kJ/mol  
99+
29th Energy Level
719.70 kJ/mol  
29
640.10 kJ/mol  
99+
30th Energy Level
719.00 kJ/mol  
23
640.10 kJ/mol  
39
Electrochemical Equivalent
1.28 g/amp-hr  
99+
0.85 g/amp-hr  
99+
Electron Work Function
4.98 eV  
10
4.05 eV  
34
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes  
Anti Corrosion, Flammable, Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
45  
99+
40  
99+
Electron Configuration
[Kr] 4d8 5s1  
[Kr] 4d2 5s2  
Crystal Structure
Face Centered Cubic (FCC)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
FCC-Crystal-Structure-of-Rhodium.jpg#100  
HCP-Crystal-Structure-of-Zirconium.jpg#100  
Atom
  
  
Number of Protons
45  
99+
40  
99+
Number of Neutrons
58  
99+
51  
99+
Number of Electrons
45  
99+
40  
99+
Radius of an Atom
  
  
Atomic Radius
134.00 pm  
99+
160.00 pm  
29
Covalent Radius
142.00 pm  
99+
175.00 pm  
25
Van der Waals Radius
200.00 pm  
35
200.00 pm  
35
Atomic Weight
102.91 amu  
99+
91.22 amu  
99+
Atomic Volume
8.30 cm3/mol  
99+
14.10 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Ruthenium
  
Yttrium
  
Next Element
Palladium
  
Niobium
  
Valence Electron Potential
64.00 (-eV)  
22
80.00 (-eV)  
18
Lattice Constant
380.34 pm  
30
323.20 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.73  
7
1.59  
25
Mechanical
Density
  
  
Density At Room Temperature
12.41 g/cm3  
30
6.52 g/cm3  
99+
Density When Liquid (at m.p.)
10.70 g/cm3  
35
5.80 g/cm3  
99+
Tensile Strength
951.00 MPa  
5
330.00 MPa  
14
Viscosity
0.00  
25
0.00  
12
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.02 (Pa)  
19
0.00 (Pa)  
21
Elasticity properties
  
  
Shear Modulus
150.00 GPa  
6
33.00 GPa  
23
Bulk Modulus
275.00 GPa  
5
91.10 GPa  
18
Young's Modulus
380.00 GPa  
5
88.00 GPa  
24
Poisson Ratio
0.26  
22
0.34  
10
Other Mechanical Properties
Malleable  
Ductile, Malleable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
12.41  
32
6.51  
99+
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
17
Susceptibility
0.00  
24
0.00  
24
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
43.30 nΩ·m  
99+
421.00 nΩ·m  
11
Electrical Conductivity
0.21 106/cm Ω  
8
0.02 106/cm Ω  
99+
Electron Affinity
109.70 kJ/mol  
8
41.10 kJ/mol  
32
Thermal
Specific Heat
0.24 J/(kg K)  
22
0.27 J/(kg K)  
19
Molar Heat Capacity
24.98 J/mol·K  
99+
25.36 J/mol·K  
99+
Thermal Conductivity
150.00 W/m·K  
9
22.60 W/m·K  
99+
Critical Temperature
2,237.00 K  
13
2,128.00 K  
17
Thermal Expansion
8.20 µm/(m·K)  
99+
5.70 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
495.40 kJ/mol  
16
581.60 kJ/mol  
11
Enthalpy of Fusion
21.76 kJ/mol  
10
20.90 kJ/mol  
11
Enthalpy of Atomization
556.50 kJ/mol  
16
598.00 kJ/mol  
12
Standard Molar Entropy
31.50 J/mol.K  
99+
39.00 J/mol.K  
99+
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