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Yttrium vs Rhodium

Yttrium
Rhodium
Rhodium vs Yttrium


Periodic Table
Symbol
Y   
Rh   
Group Number
3   
15
9   
9
Period Number
5   
5   
Block
d block   
d block   
Element Family
Transition Metal   
Transition Metal   
CAS Number
7440655   
25
7440166   
99+
Space Group Name
P63/mmc   
Fm_ 3m   
Space Group Number
194.00   
5
225.00   
2
Facts
Interesting Facts
  • Yttrium Metal is highly toxic.
  • Yttrium Metal is highly reactive in nature hence not found free in nature.
  
  • 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
Johan Gadolin   
William Hyde Wollaston   
Discovery
In 1794   
In 1804   
Abundance
  
  
Abundance In Universe
7 * 10-7 %   
17
6 * 10-8 %   
26
Abundance In Sun
~0.0000001 %   
26
~0.0000002 %   
25
Abundance In Meteorites
0.00 %   
21
0.00 %   
36
Abundance In Earth's Crust
0.00 %   
22
0.00 %   
99+
Abundance In Oceans
0.00 %   
25
Not Available   
Uses
Uses & Benefits
  • Yttrium metal is used in different alloys, as it increases the strength of aluminum Magnesium alloy. It is used for radar microwave filter.
  • It is also used as a catalyst in ethene polymerisation.
  
  • 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
Electrical Industry, Electronic 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
Yes   
No   
In Blood
0.00 Blood/mg dm-3   
26
Not Available   
In Bone
0.07 p.p.m.   
25
Not Available   
Physical Properties
Melting Point
1,523.00 °C   
27
1,966.00 °C   
12
Boiling Point
3,337.00 °C   
21
3,727.00 °C   
17
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Silvery White   
Luster
NA   
Metallic   
Hardness
  
  
Mohs Hardness
Not Available   
6.00   
6
Brinell Hardness
589.00 MPa   
22
980.00 MPa   
9
Vickers Hardness
Not Available   
1,100.00 MPa   
9
Speed of Sound
3,300.00 m/s   
23
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
Y   
Rh   
Isotopes
  
  
Known Isotopes
19   
20
16   
23
Electronegativity
  
  
Pauling Electronegativity
1.22   
38
2.28   
3
Sanderson Electronegativity
0.65   
29
Not Available   
Allred Rochow Electronegativity
1.11   
29
1.45   
16
Allen Electronegativity
1.12   
38
1.56   
24
Electropositivity
  
  
Pauling Electropositivity
2.78   
16
1.72   
99+
Ionization Energies
  
  
1st Energy Level
600.00 kJ/mol   
99+
719.70 kJ/mol   
29
2nd Energy Level
1,180.00 kJ/mol   
99+
1,740.00 kJ/mol   
26
3rd Energy Level
1,980.00 kJ/mol   
99+
2,997.00 kJ/mol   
27
4th Energy Level
5,847.00 kJ/mol   
10
Not Available   
5th Energy Level
7,430.00 kJ/mol   
14
Not Available   
6th Energy Level
8,970.00 kJ/mol   
17
Not Available   
7th Energy level
11,190.00 kJ/mol   
18
Not Available   
8th Energy Level
12,450.00 kJ/mol   
18
Not Available   
9th Energy Level
14,110.00 kJ/mol   
19
Not Available   
10th Energy Level
18,400.00 kJ/mol   
17
Not Available   
11th Energy Level
19,900.00 kJ/mol   
18
Not Available   
12th Energy Level
36,090.00 kJ/mol   
5
Not Available   
Electrochemical Equivalent
1.11 g/amp-hr   
99+
1.28 g/amp-hr   
99+
Electron Work Function
3.10 eV   
35
4.98 eV   
6
Other Chemical Properties
Chemical Stability, Flammable, Ionization, Radioactive Isotopes, Solubility   
Anti Corrosion, Ionization, Radioactive Isotopes   
Atomic Properties
Atomic Number
39   
99+
45   
99+
Electron Configuration
[Kr] 4d1 5s2   
[Kr] 4d8 5s1   
Crystal Structure
Hexagonal Close Packed (HCP)   
Face Centered Cubic (FCC)   
Crystal Lattice
HCP-Crystal-Structure-of-Yttrium.jpg#100   
FCC-Crystal-Structure-of-Rhodium.jpg#100   
Atom
  
  
Number of Protons
39   
99+
45   
99+
Number of Neutrons
50   
99+
58   
99+
Number of Electrons
39   
99+
45   
99+
Radius of an Atom
  
  
Atomic Radius
180.00 pm   
14
134.00 pm   
99+
Covalent Radius
190.00 pm   
18
142.00 pm   
99+
Van der Waals Radius
200.00 pm   
28
200.00 pm   
28
Atomic Weight
88.91 amu   
99+
102.91 amu   
99+
Atomic Volume
19.80 cm3/mol   
21
8.30 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Strontium
  
Ruthenium
  
Next Element
Zirconium
  
Palladium
  
Valence Electron Potential
48.00 (-eV)   
30
64.00 (-eV)   
22
Lattice Constant
364.74 pm   
31
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   
16
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
4.47 g/cm3   
99+
12.41 g/cm3   
28
Density When Liquid (at m.p.)
4.24 g/cm3   
99+
10.70 g/cm3   
14
Tensile Strength
Not Available   
951.00 MPa   
5
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)   
32
Not Available   
Vapor Pressure at 2000 K
4.27 (Pa)   
10
0.02 (Pa)   
19
Elasticity properties
  
  
Shear Modulus
25.60 GPa   
30
150.00 GPa   
6
Bulk Modulus
41.20 GPa   
30
275.00 GPa   
5
Young's Modulus
63.50 GPa   
32
380.00 GPa   
5
Poisson Ratio
0.24   
26
0.26   
22
Other Mechanical Properties
Ductile   
Malleable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
4.47   
99+
12.41   
20
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Conductor   
Resistivity
596.00 nΩ·m   
8
43.30 nΩ·m   
99+
Electrical Conductivity
0.02 106/cm Ω   
99+
0.21 106/cm Ω   
8
Electron Affinity
29.60 kJ/mol   
30
109.70 kJ/mol   
7
Thermal Properties
Specific Heat
0.30 J/(kg K)   
18
0.24 J/(kg K)   
22
Molar Heat Capacity
26.53 J/mol·K   
27
24.98 J/mol·K   
99+
Thermal Conductivity
17.20 W/m·K   
99+
150.00 W/m·K   
9
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
10.60 µm/(m·K)   
37
8.20 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Vaporization
393.00 kJ/mol   
18
495.40 kJ/mol   
12
Enthalpy of Fusion
17.15 kJ/mol   
16
21.76 kJ/mol   
10
Enthalpy of Atomization
418.00 kJ/mol   
18
556.50 kJ/mol   
12
Standard Molar Entropy
44.40 J/mol.K   
33
31.50 J/mol.K   
99+
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