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Ytterbium vs Rhodium

Ytterbium
Rhodium
Rhodium vs Ytterbium


Periodic Table
Symbol
Yb   
Rh   
Group Number
Not Available   
9   
9
Period Number
6   
5   
Block
f block   
d block   
Element Family
Lanthanide   
Transition Metal   
CAS Number
7440644   
26
7440166   
99+
Space Group Name
Fm_ 3m   
Fm_ 3m   
Space Group Number
225.00   
2
225.00   
2
Facts
Interesting Facts
  • Ytterbium metal oxidizes rapidly if exposed to air.
  • Ytterbium metal can dissolve quickly in Mineral acid.
  
  • 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
Jean Charles Galissard de Marignac   
William Hyde Wollaston   
Discovery
In 1878   
In 1804   
Abundance
  
  
Abundance In Universe
2 * 10-7 %   
22
6 * 10-8 %   
26
Abundance In Sun
~0.0000001 %   
26
~0.0000002 %   
25
Abundance In Meteorites
0.00 %   
36
0.00 %   
36
Abundance In Earth's Crust
0.00 %   
33
0.00 %   
99+
Abundance In Oceans
0.00 %   
37
Not Available   
Uses
Uses & Benefits
  • Ytterbium metal is used in memory devices and tuneable laser.
  • It is also used as industrial catalyst as the other catalysts are too toxic and polluting.
  
  • 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
Automobile Industry, Chemical Industry   
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry   
Medical Uses
NA   
NA   
Other Uses
Alloys   
Alloys   
Biological Properties
  
  
Toxicity
Highly Toxic   
NA   
Present in Human Body
No   
No   
Physical Properties
Melting Point
824.00 °C   
99+
1,966.00 °C   
12
Boiling Point
1,196.00 °C   
99+
3,727.00 °C   
17
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Silvery White   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
Not Available   
6.00   
6
Brinell Hardness
343.00 MPa   
31
980.00 MPa   
9
Vickers Hardness
206.00 MPa   
33
1,100.00 MPa   
9
Speed of Sound
1,590.00 m/s   
99+
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
Yb   
Rh   
Isotopes
  
  
Known Isotopes
30   
9
16   
23
Electronegativity
  
  
Pauling Electronegativity
Not Available   
2.28   
3
Allred Rochow Electronegativity
1.06   
33
1.45   
16
Allen Electronegativity
Not Available   
1.56   
24
Electropositivity
  
  
Pauling Electropositivity
Not Available   
1.72   
99+
Ionization Energies
  
  
1st Energy Level
603.40 kJ/mol   
99+
719.70 kJ/mol   
29
2nd Energy Level
1,174.80 kJ/mol   
99+
1,740.00 kJ/mol   
26
3rd Energy Level
2,417.00 kJ/mol   
99+
2,997.00 kJ/mol   
27
4th Energy Level
4,203.00 kJ/mol   
31
Not Available   
Electrochemical Equivalent
2.15 g/amp-hr   
25
1.28 g/amp-hr   
99+
Electron Work Function
Not Available   
4.98 eV   
6
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility   
Anti Corrosion, Ionization, Radioactive Isotopes   
Atomic Properties
Atomic Number
70   
99+
45   
99+
Electron Configuration
[Xe] 4f14 6s2   
[Kr] 4d8 5s1   
Crystal Structure
Face Centered Cubic (FCC)   
Face Centered Cubic (FCC)   
Crystal Lattice
FCC-Crystal-Structure-of-Ytterbium.jpg#100   
FCC-Crystal-Structure-of-Rhodium.jpg#100   
Atom
  
  
Number of Protons
70   
99+
45   
99+
Number of Neutrons
103   
31
58   
99+
Number of Electrons
70   
99+
45   
99+
Radius of an Atom
  
  
Atomic Radius
176.00 pm   
18
134.00 pm   
99+
Covalent Radius
187.00 pm   
20
142.00 pm   
99+
Van der Waals Radius
242.00 pm   
12
200.00 pm   
28
Atomic Weight
173.05 amu   
99+
102.91 amu   
99+
Atomic Volume
24.79 cm3/mol   
9
8.30 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Thulium
  
Ruthenium
  
Next Element
Lutetium
  
Palladium
  
Valence Electron Potential
50.30 (-eV)   
27
64.00 (-eV)   
22
Lattice Constant
548.47 pm   
11
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
6.90 g/cm3   
99+
12.41 g/cm3   
28
Density When Liquid (at m.p.)
6.21 g/cm3   
99+
10.70 g/cm3   
14
Tensile Strength
58.00 MPa   
18
951.00 MPa   
5
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 2000 K
Not Available   
0.02 (Pa)   
19
Elasticity properties
  
  
Shear Modulus
9.90 GPa   
99+
150.00 GPa   
6
Bulk Modulus
30.50 GPa   
39
275.00 GPa   
5
Young's Modulus
23.90 GPa   
99+
380.00 GPa   
5
Poisson Ratio
0.21   
33
0.26   
22
Other Mechanical Properties
Ductile, Malleable   
Malleable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
6.97   
99+
12.41   
20
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Conductor   
Resistivity
0.25 nΩ·m   
99+
43.30 nΩ·m   
99+
Electrical Conductivity
0.04 106/cm Ω   
38
0.21 106/cm Ω   
8
Electron Affinity
50.00 kJ/mol   
21
109.70 kJ/mol   
7
Thermal Properties
Specific Heat
0.15 J/(kg K)   
36
0.24 J/(kg K)   
22
Molar Heat Capacity
26.74 J/mol·K   
25
24.98 J/mol·K   
99+
Thermal Conductivity
38.50 W/m·K   
35
150.00 W/m·K   
9
Critical Temperature
26.30 K   
7
Not Available   
Thermal Expansion
26.30 µm/(m·K)   
14
8.20 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Vaporization
128.90 kJ/mol   
99+
495.40 kJ/mol   
12
Enthalpy of Fusion
7.66 kJ/mol   
99+
21.76 kJ/mol   
10
Enthalpy of Atomization
180.00 kJ/mol   
99+
556.50 kJ/mol   
12
Standard Molar Entropy
59.90 J/mol.K   
21
31.50 J/mol.K   
99+
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