Home
 Compare Metals

Rhodium vs Magnesium

Rhodium
Magnesium
Magnesium vs Rhodium


Periodic Table
Symbol
Rh  
Mg  
Group Number
9  
9
2  
16
Period Number
5  
3  
Block
d block  
s block  
Element Family
Transition Metal  
Alkaline Earth  
CAS Number
7440166  
99+
7439954  
99+
Space Group Name
Fm_ 3m  
P63/mmc  
Space Group Number
225.00  
2
194.00  
5
Facts
Interesting Facts
  • 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.
  
  • Magnesium ions are present in every chlorophyll of every green plant .
  • Controlling Magnesium fire by pouring water on it will result in explosions.
  
Sources
Earth's crust, Found As a By-product, Found in Minerals, Mining  
By Electrolysis Process, In Ocean, Mining  
History
  
  
Who Discovered
William Hyde Wollaston  
Joseph Black  
Discovery
In 1804  
In 1755  
Abundance
  
  
Abundance In Universe
6 * 10-8 %  
26
6 * 10-2 %  
2
Abundance In Sun
~0.0000002 %  
25
~0.07 %  
2
Abundance In Meteorites
0.00 %  
36
12.00 %  
2
Abundance In Earth's Crust
0.00 %  
99+
2.90 %  
4
Abundance In Oceans
Not Available  
0.13 %  
2
Abundance In Humans
Not Available  
0.03 %  
4
Uses
Uses & Benefits
  • 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.
  
  • Magnesium aluminum alloy improves the mechanical strength and welding characteristics and hence it is used in aeroplane and car manufacturing.
  • It is also used to remove sulfur from the molten iron and steel.
  
Industrial Uses
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry  
Aerospace Industry, Ammunition Industry, Automobile Industry, Chemical Industry, Pharmaceutical Industry  
Medical Uses
NA  
NA  
Other Uses
Alloys  
Surgical Instruments Manufacturing  
Biological Properties
  
  
Toxicity
NA  
Non Toxic  
Present in Human Body
No  
Yes  
In Blood
Not Available  
37.80 Blood/mg dm-3  
5
In Bone
Not Available  
1,800.00 p.p.m.  
4
Physical Properties
Melting Point
1,966.00 °C  
12
650.00 °C  
99+
Boiling Point
3,727.00 °C  
17
1,107.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Gray  
Luster
Metallic  
NA  
Hardness
  
  
Mohs Hardness
6.00  
6
2.50  
14
Brinell Hardness
980.00 MPa  
9
260.00 MPa  
36
Vickers Hardness
1,100.00 MPa  
9
Not Available  
Speed of Sound
4,700.00 m/s  
15
4,940.00 m/s  
11
Optical Properties
  
  
Reflectivity
84.00 %  
4
74.00 %  
7
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
Rh  
Mg  
Isotopes
  
  
Known Isotopes
16  
23
15  
24
Electronegativity
  
  
Pauling Electronegativity
2.28  
3
1.31  
31
Sanderson Electronegativity
Not Available  
1.32  
18
Allred Rochow Electronegativity
1.45  
16
1.23  
25
Mulliken-Jaffe Electronegativity
Not Available  
1.37  
16
Allen Electronegativity
1.56  
24
1.29  
35
Electropositivity
  
  
Pauling Electropositivity
1.72  
99+
2.69  
23
Ionization Energies
  
  
1st Energy Level
719.70 kJ/mol  
29
737.70 kJ/mol  
24
2nd Energy Level
1,740.00 kJ/mol  
26
1,450.70 kJ/mol  
99+
3rd Energy Level
2,997.00 kJ/mol  
27
7,732.70 kJ/mol  
5
4th Energy Level
Not Available  
10,542.50 kJ/mol  
4
5th Energy Level
Not Available  
13,630.00 kJ/mol  
3
6th Energy Level
Not Available  
18,020.00 kJ/mol  
3
7th Energy level
Not Available  
21,711.00 kJ/mol  
3
8th Energy Level
Not Available  
25,661.00 kJ/mol  
3
9th Energy Level
Not Available  
31,653.00 kJ/mol  
3
10th Energy Level
Not Available  
35,458.00 kJ/mol  
5
11th Energy Level
Not Available  
169,988.00 kJ/mol  
1
12th Energy Level
Not Available  
189,368.00 kJ/mol  
1
Electrochemical Equivalent
1.28 g/amp-hr  
99+
0.45 g/amp-hr  
99+
Electron Work Function
4.98 eV  
6
3.66 eV  
29
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes  
Corrosion, Highly Inflammable, Ionization, Solubility  
Atomic Properties
Atomic Number
45  
99+
12  
99+
Electron Configuration
[Kr] 4d8 5s1  
[Ne] 3s2  
Crystal Structure
Face Centered Cubic (FCC)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
FCC-Crystal-Structure-of-Rhodium.jpg#100  
HCP-Crystal-Structure-of-Magnesium.jpg#100  
Atom
  
  
Number of Protons
45  
99+
12  
99+
Number of Neutrons
58  
99+
12  
99+
Number of Electrons
45  
99+
12  
99+
Radius of an Atom
  
  
Atomic Radius
134.00 pm  
99+
160.00 pm  
27
Covalent Radius
142.00 pm  
99+
141.00 pm  
99+
Van der Waals Radius
200.00 pm  
28
173.00 pm  
37
Atomic Weight
102.91 amu  
99+
24.31 amu  
99+
Atomic Volume
8.30 cm3/mol  
99+
13.97 cm3/mol  
37
Adjacent Atomic Numbers
  
  
Previous Element
Ruthenium
  
Sodium
  
Next Element
Palladium
  
Aluminium
  
Valence Electron Potential
64.00 (-eV)  
22
40.00 (-eV)  
99+
Lattice Constant
380.34 pm  
27
320.94 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
Not Available  
Not Available  
Mechanical Properties
Density
  
  
Density At Room Temperature
12.41 g/cm3  
28
1.74 g/cm3  
99+
Density When Liquid (at m.p.)
10.70 g/cm3  
14
1.58 g/cm3  
99+
Tensile Strength
951.00 MPa  
5
Not Available  
Viscosity
Not Available  
Not Available  
Vapor Pressure
  
  
Vapor Pressure at 2000 K
0.02 (Pa)  
19
Not Available  
Elasticity properties
  
  
Shear Modulus
150.00 GPa  
6
17.00 GPa  
37
Bulk Modulus
275.00 GPa  
5
45.00 GPa  
25
Young's Modulus
380.00 GPa  
5
45.00 GPa  
39
Poisson Ratio
0.26  
22
0.29  
15
Other Mechanical Properties
Malleable  
NA  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
12.41  
20
1.74  
99+
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
43.30 nΩ·m  
99+
43.90 nΩ·m  
99+
Electrical Conductivity
0.21 106/cm Ω  
8
0.23 106/cm Ω  
7
Electron Affinity
109.70 kJ/mol  
7
0.00 kJ/mol  
40
Thermal Properties
Specific Heat
0.24 J/(kg K)  
22
1.02 J/(kg K)  
4
Molar Heat Capacity
24.98 J/mol·K  
99+
24.87 J/mol·K  
99+
Thermal Conductivity
150.00 W/m·K  
9
156.00 W/m·K  
8
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
8.20 µm/(m·K)  
99+
24.80 µm/(m·K)  
15
Enthalpy
  
  
Enthalpy of Vaporization
495.40 kJ/mol  
12
128.70 kJ/mol  
99+
Enthalpy of Fusion
21.76 kJ/mol  
10
8.95 kJ/mol  
39
Enthalpy of Atomization
556.50 kJ/mol  
12
148.50 kJ/mol  
99+
Standard Molar Entropy
31.50 J/mol.K  
99+
32.70 J/mol.K  
99+
Periodic Table >>
<< All

Compare Transition Metals

Transition Metals

Transition Metals

» More Transition Metals

Compare Transition Metals

» More Compare Transition Metals
Home | About | Contact | Disclaimer | Terms of use
© A softusvista inc. venture!