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Rhodium vs Meitnerium

Rhodium
Meitnerium
Meitnerium vs Rhodium


Periodic Table
Symbol
Rh  
Mt  
Group Number
9  
9
9  
9
Period Number
5  
7  
Block
d block  
d block  
Element Family
Transition Metal  
Probably Transition  
CAS Number
7440166  
99+
54038016  
10
Space Group Name
Fm_ 3m  
-  
Space Group Number
225.00  
3
166.00  
9
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.
  
Meitnerium is named after Lise Meitner, an Austrian physicist.  
Sources
Earth's crust, Found As a By-product, Found in Minerals, Mining  
Bombarding Bi209 with Accelerated Nuclei of Fe58, Synthetically Produced  
History
  
  
Who Discovered
William Hyde Wollaston  
Gesellschaft für Schwerionenforschung  
Discovery
In 1804  
In 1982  
Abundance
  
  
Abundance In Universe
0.00 %  
27
0.00 %  
40
Abundance In Sun
0.00 %  
25
-  
Abundance In Meteorites
0.00 %  
36
0.00 %  
99+
Abundance In Earth's Crust
0.00 %  
99+
-  
Abundance In Oceans
-  
-  
Abundance In Humans
0.00 %  
24
-  
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.
  
  • Currently known uses of Meitnerium metal are limited to research purpose only.
  
Industrial Uses
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry  
-  
Medical Uses
-  
-  
Other Uses
Alloys  
-  
Biological Properties
  
  
Toxicity
-  
-  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
37
0.00 Blood/mg dm-3  
40
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
1,966.00 °C  
12
-  
Boiling Point
3,727.00 °C  
17
0.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
-  
Luster
Metallic  
Unknown Luster  
Hardness
  
  
Mohs Hardness
6.00  
6
-  
Brinell Hardness
980.00 MPa  
10
400.00 MPa  
34
Vickers Hardness
1,100.00 MPa  
15
350.00 MPa  
99+
Speed of Sound
4,700.00 m/s  
19
3,200.00 m/s  
35
Optical Properties
  
  
Refractive Index
2.40  
7
1.30  
99+
Reflectivity
84.00 %  
5
68.00 %  
15
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Rh  
Mt  
Isotopes
  
  
Known Isotopes
16  
23
4  
33
Electronegativity
  
  
Pauling Electronegativity
2.28  
4
1.30  
33
Sanderson Electronegativity
2.28  
5
1.90  
13
Allred Rochow Electronegativity
1.45  
17
1.30  
25
Mulliken-Jaffe Electronegativity
2.28  
4
1.30  
33
Allen Electronegativity
1.56  
27
1.30  
40
Electropositivity
  
  
Pauling Electropositivity
1.72  
99+
2.00  
99+
Ionization Energies
  
  
1st Energy Level
719.70 kJ/mol  
29
800.80 kJ/mol  
15
2nd Energy Level
1,740.00 kJ/mol  
27
1,823.60 kJ/mol  
18
3rd Energy Level
2,997.00 kJ/mol  
27
2,904.20 kJ/mol  
31
4th Energy Level
7,197.00 kJ/mol  
11
3,859.40 kJ/mol  
99+
5th Energy Level
7,197.00 kJ/mol  
26
4,920.80 kJ/mol  
99+
6th Energy Level
7,197.00 kJ/mol  
40
8,000.00 kJ/mol  
34
7th Energy level
7,197.00 kJ/mol  
35
8,000.00 kJ/mol  
28
8th Energy Level
3,480.00 kJ/mol  
99+
8,000.00 kJ/mol  
28
9th Energy Level
5,090.00 kJ/mol  
99+
6,700.00 kJ/mol  
36
10th Energy Level
7,197.00 kJ/mol  
33
5,800.00 kJ/mol  
99+
11th Energy Level
7,197.00 kJ/mol  
32
6,300.00 kJ/mol  
99+
12th Energy Level
7,190.00 kJ/mol  
99+
0.00 kJ/mol  
99+
13th Energy Level
7,190.00 kJ/mol  
27
8,000.00 kJ/mol  
20
14th Energy Level
7,197.00 kJ/mol  
21
1,156.00 kJ/mol  
99+
15th Energy Level
71,900.00 kJ/mol  
23
80,000.00 kJ/mol  
17
16th Energy Level
71,900.00 kJ/mol  
18
58,700.00 kJ/mol  
39
17th Energy Level
719.70 kJ/mol  
39
1,110.00 kJ/mol  
20
18th Energy Level
7,197.00 kJ/mol  
29
8,000.00 kJ/mol  
23
19th Energy Level
719.70 kJ/mol  
36
1,110.00 kJ/mol  
17
20th Energy Level
719.00 kJ/mol  
30
850.00 kJ/mol  
18
21st Energy Level
719.70 kJ/mol  
99+
800.00 kJ/mol  
99+
22nd Energy Level
719.00 kJ/mol  
24
380.00 kJ/mol  
99+
23rd Energy Level
719.70 kJ/mol  
99+
8,000.00 kJ/mol  
9
24th Energy Level
719.70 kJ/mol  
23
565.60 kJ/mol  
99+
25th Energy Level
719.00 kJ/mol  
23
800.00 kJ/mol  
13
26th Energy Level
719.70 kJ/mol  
23
800.00 kJ/mol  
13
27th Energy Level
719.70 kJ/mol  
22
800.00 kJ/mol  
12
28th Energy Level
719.70 kJ/mol  
28
800.00 kJ/mol  
18
29th Energy Level
719.70 kJ/mol  
29
800.00 kJ/mol  
18
30th Energy Level
719.00 kJ/mol  
23
800.00 kJ/mol  
13
Electrochemical Equivalent
1.28 g/amp-hr  
99+
3.00 g/amp-hr  
21
Electron Work Function
4.98 eV  
10
4.90 eV  
12
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes  
Ionization, Radioactive Isotopes, Radioactivity  
Atomic
Atomic Number
45  
99+
109  
9
Electron Configuration
[Kr] 4d8 5s1  
[Rn] 5f14 6d7 7s2  
Crystal Structure
Face Centered Cubic (FCC)  
Face Centered Cubic (FCC)  
Crystal Lattice
FCC-Crystal-Structure-of-Rhodium.jpg#100  
FCC-Crystal-Structure-of-Meitnerium.jpg#100  
Atom
  
  
Number of Protons
45  
99+
109  
9
Number of Neutrons
58  
99+
157  
8
Number of Electrons
45  
99+
109  
9
Radius of an Atom
  
  
Atomic Radius
134.00 pm  
99+
122.00 pm  
99+
Covalent Radius
142.00 pm  
99+
129.00 pm  
99+
Van der Waals Radius
200.00 pm  
35
260.00 pm  
9
Atomic Weight
102.91 amu  
99+
278.00 amu  
7
Atomic Volume
8.30 cm3/mol  
99+
20.20 cm3/mol  
30
Adjacent Atomic Numbers
  
  
Previous Element
Ruthenium
  
Hassium
  
Next Element
Palladium
  
Darmstadtium
  
Valence Electron Potential
64.00 (-eV)  
22
31.20 (-eV)  
99+
Lattice Constant
380.34 pm  
30
0.00 pm  
99+
Lattice Angles
π/2, π/2, π/2  
-  
Lattice C/A Ratio
1.73  
7
1.59  
27
Mechanical
Density
  
  
Density At Room Temperature
12.41 g/cm3  
30
37.40 g/cm3  
2
Density When Liquid (at m.p.)
10.70 g/cm3  
35
37.40 g/cm3  
2
Tensile Strength
951.00 MPa  
5
80.00 MPa  
29
Viscosity
0.00  
25
0.00  
25
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)  
37
Elasticity properties
  
  
Shear Modulus
150.00 GPa  
6
35.00 GPa  
21
Bulk Modulus
275.00 GPa  
5
0.00 GPa  
99+
Young's Modulus
380.00 GPa  
5
13.50 GPa  
99+
Poisson Ratio
0.26  
22
0.25  
24
Other Mechanical Properties
Malleable  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
12.41  
32
37.40  
4
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
12
Susceptibility
0.00  
24
0.00  
24
Electrical Properties
  
  
Electrical Property
Conductor  
-  
Resistivity
43.30 nΩ·m  
99+
0.35 nΩ·m  
99+
Electrical Conductivity
0.21 106/cm Ω  
8
0.00 106/cm Ω  
99+
Electron Affinity
109.70 kJ/mol  
8
50.00 kJ/mol  
26
Thermal
Specific Heat
0.24 J/(kg K)  
22
0.10 J/(kg K)  
99+
Molar Heat Capacity
24.98 J/mol·K  
99+
27.00 J/mol·K  
29
Thermal Conductivity
150.00 W/m·K  
9
0.00 W/m·K  
99+
Critical Temperature
2,237.00 K  
13
1,323.00 K  
99+
Thermal Expansion
8.20 µm/(m·K)  
99+
10.30 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
495.40 kJ/mol  
16
110.00 kJ/mol  
99+
Enthalpy of Fusion
21.76 kJ/mol  
10
-  
Enthalpy of Atomization
556.50 kJ/mol  
16
350.20 kJ/mol  
37
Standard Molar Entropy
31.50 J/mol.K  
99+
63.80 J/mol.K  
22
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