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Indium vs Rhodium

Indium
Rhodium
Rhodium vs Indium


Periodic Table
Symbol
In   
Rh   
Group Number
13   
5
9   
9
Period Number
5   
5   
Block
p block   
d block   
Element Family
Post-​Transition   
Transition Metal   
CAS Number
7440746   
17
7440166   
99+
Space Group Name
I4/mmm   
Fm_ 3m   
Space Group Number
139.00   
8
225.00   
2
Facts
Interesting Facts
  • Luster of Indium is bright in nature.
  • Reich and richer were looking for thallium in zinc metal and they discovered Indium 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
Mining, Ores of metals   
Earth's crust, Found As a By-product, Found in Minerals, Mining   
History
  
  
Who Discovered
Ferdinand Reich and Hieronymous Theodor Richter   
William Hyde Wollaston   
Discovery
In 1863   
In 1804   
Abundance
  
  
Abundance In Universe
3 * 10-8 %   
28
6 * 10-8 %   
26
Abundance In Sun
~0.0000004 %   
23
~0.0000002 %   
25
Abundance In Meteorites
0.00 %   
99+
0.00 %   
36
Abundance In Earth's Crust
0.00 %   
99+
0.00 %   
99+
Abundance In Oceans
0.00 %   
99+
Not Available   
Uses
Uses & Benefits
  • It is used to produce indium tin oxide (ITO), it is used in manufacturing touch screens, flat screen TVs and solar panels.
  • Its nitride, phosphide and antimonide are used in transistors and microchips.
  
  • 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
Aerospace Industry, Automobile Industry   
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry   
Medical Uses
Medical Research   
NA   
Other Uses
Alloys, In Nuclear Reactors   
Alloys   
Biological Properties
  
  
Toxicity
Non Toxic   
NA   
Present in Human Body
Yes   
No   
Physical Properties
Melting Point
156.61 °C   
99+
1,966.00 °C   
12
Boiling Point
2,000.00 °C   
99+
3,727.00 °C   
17
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery Gray   
Silvery White   
Luster
Lustrous   
Metallic   
Hardness
  
  
Mohs Hardness
1.20   
20
6.00   
6
Brinell Hardness
8.80 MPa   
99+
980.00 MPa   
9
Vickers Hardness
Not Available   
1,100.00 MPa   
9
Speed of Sound
1,215.00 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
In   
Rh   
Isotopes
  
  
Known Isotopes
35   
4
16   
23
Electronegativity
  
  
Pauling Electronegativity
1.78   
16
2.28   
3
Sanderson Electronegativity
2.14   
8
Not Available   
Allred Rochow Electronegativity
1.49   
13
1.45   
16
Mulliken-Jaffe Electronegativity
1.76   
10
Not Available   
Allen Electronegativity
1.66   
18
1.56   
24
Electropositivity
  
  
Pauling Electropositivity
2.22   
38
1.72   
99+
Ionization Energies
  
  
1st Energy Level
558.30 kJ/mol   
99+
719.70 kJ/mol   
29
2nd Energy Level
1,820.70 kJ/mol   
18
1,740.00 kJ/mol   
26
3rd Energy Level
2,704.00 kJ/mol   
39
2,997.00 kJ/mol   
27
4th Energy Level
5,210.00 kJ/mol   
17
Not Available   
Electrochemical Equivalent
1.43 g/amp-hr   
99+
1.28 g/amp-hr   
99+
Electron Work Function
4.12 eV   
24
4.98 eV   
6
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Anti Corrosion, Ionization, Radioactive Isotopes   
Atomic Properties
Atomic Number
49   
99+
45   
99+
Electron Configuration
[Kr] 4d10 5s2 5p1   
[Kr] 4d8 5s1   
Crystal Structure
Tetragonal (TETR)   
Face Centered Cubic (FCC)   
Crystal Lattice
TETR-Crystal-Structure-of-Indium.jpg#100   
FCC-Crystal-Structure-of-Rhodium.jpg#100   
Atom
  
  
Number of Protons
49   
99+
45   
99+
Number of Neutrons
66   
99+
58   
99+
Number of Electrons
49   
99+
45   
99+
Radius of an Atom
  
  
Atomic Radius
167.00 pm   
24
134.00 pm   
99+
Covalent Radius
142.00 pm   
99+
142.00 pm   
99+
Van der Waals Radius
193.00 pm   
31
200.00 pm   
28
Atomic Weight
114.82 amu   
99+
102.91 amu   
99+
Atomic Volume
15.70 cm3/mol   
33
8.30 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Cadmium
  
Ruthenium
  
Next Element
Tin
  
Palladium
  
Valence Electron Potential
54.00 (-eV)   
25
64.00 (-eV)   
22
Lattice Constant
325.23 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
7.31 g/cm3   
99+
12.41 g/cm3   
28
Density When Liquid (at m.p.)
7.02 g/cm3   
33
10.70 g/cm3   
14
Tensile Strength
2.50 MPa   
21
951.00 MPa   
5
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.01 (Pa)   
11
Not Available   
Vapor Pressure at 2000 K
Not Available   
0.02 (Pa)   
19
Elasticity properties
  
  
Shear Modulus
Not Available   
150.00 GPa   
6
Bulk Modulus
Not Available   
275.00 GPa   
5
Young's Modulus
11.00 GPa   
99+
380.00 GPa   
5
Poisson Ratio
Not Available   
0.26   
22
Other Mechanical Properties
Ductile, Malleable   
Malleable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
7.31   
99+
12.41   
20
Magnetic Ordering
Diamagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Conductor   
Resistivity
83.70 nΩ·m   
34
43.30 nΩ·m   
99+
Electrical Conductivity
0.12 106/cm Ω   
17
0.21 106/cm Ω   
8
Electron Affinity
28.90 kJ/mol   
31
109.70 kJ/mol   
7
Thermal Properties
Specific Heat
0.23 J/(kg K)   
27
0.24 J/(kg K)   
22
Molar Heat Capacity
26.74 J/mol·K   
25
24.98 J/mol·K   
99+
Thermal Conductivity
81.80 W/m·K   
21
150.00 W/m·K   
9
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
32.10 µm/(m·K)   
9
8.20 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Vaporization
226.40 kJ/mol   
40
495.40 kJ/mol   
12
Enthalpy of Fusion
3.28 kJ/mol   
99+
21.76 kJ/mol   
10
Enthalpy of Atomization
242.70 kJ/mol   
99+
556.50 kJ/mol   
12
Standard Molar Entropy
57.80 J/mol.K   
22
31.50 J/mol.K   
99+
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