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Dysprosium vs Rhodium

Dysprosium
Rhodium
Rhodium vs Dysprosium


Periodic Table
Symbol
Dy   
Rh   
Group Number
Not Available   
9   
9
Period Number
6   
5   
Block
f block   
d block   
Element Family
Lanthanide   
Transition Metal   
CAS Number
7429916   
99+
7440166   
99+
Space Group Name
P63/mmc   
Fm_ 3m   
Space Group Number
194.00   
5
225.00   
2
Facts
Interesting Facts
  • Dysprosium acts stable in air at room temperature.
  • Dysprosium behaves very much like paramagnetic metal.
  
  • 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
Lecoq de Boisbaudran   
William Hyde Wollaston   
Discovery
In 1886   
In 1804   
Abundance
  
  
Abundance In Universe
2 * 10-7 %   
22
6 * 10-8 %   
26
Abundance In Sun
~0.0000002 %   
25
~0.0000002 %   
25
Abundance In Meteorites
0.00 %   
33
0.00 %   
36
Abundance In Earth's Crust
0.00 %   
28
0.00 %   
99+
Abundance In Oceans
0.00 %   
35
Not Available   
Uses
Uses & Benefits
  • Dysprosium metal is highly reactive due to which it pure form is not as usual as its alloy.
  • Thi metals alloy is used in magnate as it is resistance to high temperature.
  
  • 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
NA   
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry   
Medical Uses
NA   
NA   
Other Uses
Alloys, Nuclear Research   
Alloys   
Biological Properties
  
  
Toxicity
Mildly Toxic   
NA   
Present in Human Body
No   
No   
Physical Properties
Melting Point
1,407.00 °C   
32
1,966.00 °C   
12
Boiling Point
2,562.00 °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
500.00 MPa   
23
980.00 MPa   
9
Vickers Hardness
540.00 MPa   
20
1,100.00 MPa   
9
Speed of Sound
2,710.00 m/s   
33
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
Dy   
Rh   
Isotopes
  
  
Known Isotopes
29   
10
16   
23
Electronegativity
  
  
Pauling Electronegativity
1.22   
38
2.28   
3
Allred Rochow Electronegativity
1.10   
30
1.45   
16
Allen Electronegativity
Not Available   
1.56   
24
Electropositivity
  
  
Pauling Electropositivity
2.78   
16
1.72   
99+
Ionization Energies
  
  
1st Energy Level
573.00 kJ/mol   
99+
719.70 kJ/mol   
29
2nd Energy Level
1,130.00 kJ/mol   
99+
1,740.00 kJ/mol   
26
3rd Energy Level
2,200.00 kJ/mol   
99+
2,997.00 kJ/mol   
27
4th Energy Level
3,990.00 kJ/mol   
37
Not Available   
Electrochemical Equivalent
2.02 g/amp-hr   
29
1.28 g/amp-hr   
99+
Electron Work Function
Not Available   
4.98 eV   
6
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility   
Anti Corrosion, Ionization, Radioactive Isotopes   
Atomic Properties
Atomic Number
66   
99+
45   
99+
Electron Configuration
[Xe] 4f9 6s2   
[Kr] 4d8 5s1   
Crystal Structure
Hexagonal Close Packed (HCP)   
Face Centered Cubic (FCC)   
Crystal Lattice
HCP-Crystal-Structure-of-Dysprosium.jpg#100   
FCC-Crystal-Structure-of-Rhodium.jpg#100   
Atom
  
  
Number of Protons
66   
99+
45   
99+
Number of Neutrons
96   
35
58   
99+
Number of Electrons
66   
99+
45   
99+
Radius of an Atom
  
  
Atomic Radius
178.00 pm   
16
134.00 pm   
99+
Covalent Radius
192.00 pm   
17
142.00 pm   
99+
Van der Waals Radius
229.00 pm   
20
200.00 pm   
28
Atomic Weight
162.50 amu   
99+
102.91 amu   
99+
Atomic Volume
19.00 cm3/mol   
23
8.30 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Terbium
  
Ruthenium
  
Next Element
Holmium
  
Palladium
  
Valence Electron Potential
47.40 (-eV)   
32
64.00 (-eV)   
22
Lattice Constant
359.30 pm   
37
380.34 pm   
27
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   
Lattice C/A Ratio
1.57   
15
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
8.54 g/cm3   
99+
12.41 g/cm3   
28
Density When Liquid (at m.p.)
8.37 g/cm3   
25
10.70 g/cm3   
14
Tensile Strength
120.00 MPa   
15
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
24.70 GPa   
31
150.00 GPa   
6
Bulk Modulus
40.50 GPa   
31
275.00 GPa   
5
Young's Modulus
61.40 GPa   
33
380.00 GPa   
5
Poisson Ratio
0.25   
25
0.26   
22
Other Mechanical Properties
Sectile   
Malleable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
8.55   
38
12.41   
20
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Conductor   
Resistivity
926.00 nΩ·m   
2
43.30 nΩ·m   
99+
Electrical Conductivity
0.01 106/cm Ω   
99+
0.21 106/cm Ω   
8
Electron Affinity
50.00 kJ/mol   
21
109.70 kJ/mol   
7
Thermal Properties
Specific Heat
0.17 J/(kg K)   
34
0.24 J/(kg K)   
22
Molar Heat Capacity
27.70 J/mol·K   
14
24.98 J/mol·K   
99+
Thermal Conductivity
10.70 W/m·K   
99+
150.00 W/m·K   
9
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
9.90 µm/(m·K)   
40
8.20 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Vaporization
230.00 kJ/mol   
39
495.40 kJ/mol   
12
Enthalpy of Fusion
11.05 kJ/mol   
32
21.76 kJ/mol   
10
Enthalpy of Atomization
301.00 kJ/mol   
36
556.50 kJ/mol   
12
Standard Molar Entropy
75.60 J/mol.K   
7
31.50 J/mol.K   
99+
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