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Uranium vs Rhodium

Uranium
Rhodium
Rhodium vs Uranium


Periodic Table
Symbol
U   
Rh   
Group Number
0   
18
9   
9
Period Number
7   
5   
Block
f block   
d block   
Element Family
Actinide   
Transition Metal   
CAS Number
7440611   
28
7440166   
99+
Space Group Name
Cmcm   
Fm_ 3m   
Space Group Number
63.00   
10
225.00   
2
Facts
Interesting Facts
  • Major mining countries of Uranium include Russia, Australia, Namibia, Canada and Niger and total 33% Uranium are mine in Kazakhstan.
  
  • 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
Earth's crust, Mining, Ores of Minerals   
Earth's crust, Found As a By-product, Found in Minerals, Mining   
History
  
  
Who Discovered
Not Available   
William Hyde Wollaston   
Discovery
In 1789   
In 1804   
Abundance
  
  
Abundance In Universe
2 * 10-8 %   
29
6 * 10-8 %   
26
Abundance In Sun
~0.0000001 %   
26
~0.0000002 %   
25
Abundance In Meteorites
0.00 %   
99+
0.00 %   
36
Abundance In Earth's Crust
0.00 %   
36
0.00 %   
99+
Abundance In Oceans
0.00 %   
11
Not Available   
Uses
Uses & Benefits
  • The main use of this metal include nuclear fuel which is used to generate electricity yin nuclear power stations.
  • Synthetic elements like transuranium are made from Uranium metal.
  
  • 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
Ammunition Industry, Chemical Industry   
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry   
Medical Uses
NA   
NA   
Other Uses
Alloys, Jewellery, Nuclear Reactor's Fuel, Sculptures, Statues   
Alloys   
Biological Properties
  
  
Toxicity
Toxic   
NA   
Present in Human Body
No   
No   
Physical Properties
Melting Point
1,132.00 °C   
39
1,966.00 °C   
12
Boiling Point
3,818.00 °C   
16
3,727.00 °C   
17
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery Gray   
Silvery White   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
6.00   
6
6.00   
6
Brinell Hardness
2,350.00 MPa   
2
980.00 MPa   
9
Vickers Hardness
1,960.00 MPa   
2
1,100.00 MPa   
9
Speed of Sound
3,155.00 m/s   
25
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
U   
Rh   
Isotopes
  
  
Known Isotopes
25   
14
16   
23
Electronegativity
  
  
Pauling Electronegativity
1.38   
28
2.28   
3
Allred Rochow Electronegativity
1.22   
26
1.45   
16
Allen Electronegativity
Not Available   
1.56   
24
Electropositivity
  
  
Pauling Electropositivity
2.62   
26
1.72   
99+
Ionization Energies
  
  
1st Energy Level
597.60 kJ/mol   
99+
719.70 kJ/mol   
29
2nd Energy Level
1,420.00 kJ/mol   
99+
1,740.00 kJ/mol   
26
3rd Energy Level
1,900.00 kJ/mol   
99+
2,997.00 kJ/mol   
27
4th Energy Level
3,145.00 kJ/mol   
99+
Not Available   
Electrochemical Equivalent
1.48 g/amp-hr   
99+
1.28 g/amp-hr   
99+
Electron Work Function
3.63 eV   
30
4.98 eV   
6
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Anti Corrosion, Ionization, Radioactive Isotopes   
Atomic Properties
Atomic Number
92   
26
45   
99+
Electron Configuration
[Rn] 5f3 6d1 7s2   
[Kr] 4d8 5s1   
Crystal Structure
Orthorhombic (ORTH)   
Face Centered Cubic (FCC)   
Crystal Lattice
ORTH-Crystal-Structure-of-Uranium.jpg#100   
FCC-Crystal-Structure-of-Rhodium.jpg#100   
Atom
  
  
Number of Protons
92   
26
45   
99+
Number of Neutrons
146   
13
58   
99+
Number of Electrons
92   
26
45   
99+
Radius of an Atom
  
  
Atomic Radius
156.00 pm   
29
134.00 pm   
99+
Covalent Radius
196.00 pm   
14
142.00 pm   
99+
Van der Waals Radius
186.00 pm   
33
200.00 pm   
28
Atomic Weight
238.03 amu   
21
102.91 amu   
99+
Atomic Volume
12.59 cm3/mol   
40
8.30 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Protactinium
  
Ruthenium
  
Next Element
Neptunium
  
Palladium
  
Valence Electron Potential
170.00 (-eV)   
4
64.00 (-eV)   
22
Lattice Constant
295.08 pm   
99+
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
19.10 g/cm3   
17
12.41 g/cm3   
28
Density When Liquid (at m.p.)
17.30 g/cm3   
7
10.70 g/cm3   
14
Tensile Strength
Not Available   
951.00 MPa   
5
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 2000 K
0.01 (Pa)   
20
0.02 (Pa)   
19
Elasticity properties
  
  
Shear Modulus
111.00 GPa   
10
150.00 GPa   
6
Bulk Modulus
100.00 GPa   
16
275.00 GPa   
5
Young's Modulus
208.00 GPa   
10
380.00 GPa   
5
Poisson Ratio
0.23   
30
0.26   
22
Other Mechanical Properties
Ductile, Malleable   
Malleable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
18.80   
10
12.41   
20
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Poor Conductor   
Conductor   
Resistivity
0.28 nΩ·m   
99+
43.30 nΩ·m   
99+
Electrical Conductivity
0.04 106/cm Ω   
37
0.21 106/cm Ω   
8
Electron Affinity
Not Available   
109.70 kJ/mol   
7
Thermal Properties
Specific Heat
0.12 J/(kg K)   
40
0.24 J/(kg K)   
22
Molar Heat Capacity
27.67 J/mol·K   
15
24.98 J/mol·K   
99+
Thermal Conductivity
27.50 W/m·K   
40
150.00 W/m·K   
9
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
13.90 µm/(m·K)   
27
8.20 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Vaporization
477.00 kJ/mol   
13
495.40 kJ/mol   
12
Enthalpy of Fusion
15.48 kJ/mol   
19
21.76 kJ/mol   
10
Enthalpy of Atomization
489.50 kJ/mol   
14
556.50 kJ/mol   
12
Standard Molar Entropy
50.20 J/mol.K   
31
31.50 J/mol.K   
99+
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