Home
 Compare Metals

Magnesium vs Rhodium

Magnesium
Rhodium
Rhodium vs Magnesium


Periodic Table
Symbol
Mg  
Rh  
Group Number
2  
16
9  
9
Period Number
3  
5  
Block
s block  
d block  
Element Family
Alkaline Earth  
Transition Metal  
CAS Number
7439954  
99+
7440166  
99+
Space Group Name
P63/mmc  
Fm_ 3m  
Space Group Number
194.00  
7
225.00  
3
Facts
Interesting Facts
  • Magnesium ions are present in every chlorophyll of every green plant .
  • Controlling Magnesium fire by pouring water on it will result in explosions.
  
  • 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
By Electrolysis Process, In Ocean, Mining  
Earth's crust, Found As a By-product, Found in Minerals, Mining  
History
  
  
Who Discovered
Joseph Black  
William Hyde Wollaston  
Discovery
In 1755  
In 1804  
Abundance
  
  
Abundance In Universe
0.06 %  
3
0.00 %  
27
Abundance In Sun
0.07 %  
2
0.00 %  
25
Abundance In Meteorites
12.00 %  
2
0.00 %  
36
Abundance In Earth's Crust
2.90 %  
4
0.00 %  
99+
Abundance In Oceans
0.13 %  
2
-  
Abundance In Humans
0.03 %  
5
0.00 %  
24
Uses
Uses & Benefits
  • 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.
  
  • 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, Ammunition Industry, Automobile Industry, Chemical Industry, Pharmaceutical Industry  
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry  
Medical Uses
-  
-  
Other Uses
Surgical Instruments Manufacturing  
Alloys  
Biological Properties
  
  
Toxicity
Non Toxic  
-  
Present in Human Body
Yes  
No  
In Blood
37.80 Blood/mg dm-3  
5
0.00 Blood/mg dm-3  
37
In Bone
1,800.00 p.p.m.  
4
0.00 p.p.m.  
99+
Physical
Melting Point
650.00 °C  
99+
1,966.00 °C  
12
Boiling Point
1,107.00 °C  
99+
3,727.00 °C  
17
Appearance
  
  
Physical State
Solid  
Solid  
Color
Gray  
Silvery White  
Luster
-  
Metallic  
Hardness
  
  
Mohs Hardness
2.50  
15
6.00  
6
Brinell Hardness
260.00 MPa  
99+
980.00 MPa  
10
Vickers Hardness
260.00 MPa  
99+
1,100.00 MPa  
15
Speed of Sound
4,940.00 m/s  
15
4,700.00 m/s  
19
Optical Properties
  
  
Refractive Index
1.49  
37
2.40  
7
Reflectivity
74.00 %  
9
84.00 %  
5
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Mg  
Rh  
Isotopes
  
  
Known Isotopes
15  
24
16  
23
Electronegativity
  
  
Pauling Electronegativity
1.31  
32
2.28  
4
Sanderson Electronegativity
1.32  
24
2.28  
5
Allred Rochow Electronegativity
1.23  
26
1.45  
17
Mulliken-Jaffe Electronegativity
1.37  
30
2.28  
4
Allen Electronegativity
1.29  
99+
1.56  
27
Electropositivity
  
  
Pauling Electropositivity
2.69  
23
1.72  
99+
Ionization Energies
  
  
1st Energy Level
737.70 kJ/mol  
24
719.70 kJ/mol  
29
2nd Energy Level
1,450.70 kJ/mol  
99+
1,740.00 kJ/mol  
27
3rd Energy Level
7,732.70 kJ/mol  
5
2,997.00 kJ/mol  
27
4th Energy Level
10,542.50 kJ/mol  
4
7,197.00 kJ/mol  
11
5th Energy Level
13,630.00 kJ/mol  
3
7,197.00 kJ/mol  
26
6th Energy Level
18,020.00 kJ/mol  
3
7,197.00 kJ/mol  
40
7th Energy level
21,711.00 kJ/mol  
3
7,197.00 kJ/mol  
35
8th Energy Level
25,661.00 kJ/mol  
3
3,480.00 kJ/mol  
99+
9th Energy Level
31,653.00 kJ/mol  
3
5,090.00 kJ/mol  
99+
10th Energy Level
35,458.00 kJ/mol  
5
7,197.00 kJ/mol  
33
11th Energy Level
169,988.00 kJ/mol  
1
7,197.00 kJ/mol  
32
12th Energy Level
189,368.00 kJ/mol  
1
7,190.00 kJ/mol  
99+
13th Energy Level
7,370.00 kJ/mol  
24
7,190.00 kJ/mol  
27
14th Energy Level
737.70 kJ/mol  
99+
7,197.00 kJ/mol  
21
15th Energy Level
73,700.00 kJ/mol  
21
71,900.00 kJ/mol  
23
16th Energy Level
73,770.00 kJ/mol  
16
71,900.00 kJ/mol  
18
17th Energy Level
737.70 kJ/mol  
37
719.70 kJ/mol  
39
18th Energy Level
7,370.00 kJ/mol  
27
7,197.00 kJ/mol  
29
19th Energy Level
737.70 kJ/mol  
34
719.70 kJ/mol  
36
20th Energy Level
737.00 kJ/mol  
28
719.00 kJ/mol  
30
21st Energy Level
737.70 kJ/mol  
99+
719.70 kJ/mol  
99+
22nd Energy Level
738.00 kJ/mol  
22
719.00 kJ/mol  
24
23rd Energy Level
737.70 kJ/mol  
99+
719.70 kJ/mol  
99+
24th Energy Level
737.70 kJ/mol  
20
719.70 kJ/mol  
23
25th Energy Level
737.70 kJ/mol  
20
719.00 kJ/mol  
23
26th Energy Level
737.70 kJ/mol  
20
719.70 kJ/mol  
23
27th Energy Level
737.70 kJ/mol  
19
719.70 kJ/mol  
22
28th Energy Level
737.70 kJ/mol  
25
719.70 kJ/mol  
28
29th Energy Level
737.70 kJ/mol  
26
719.70 kJ/mol  
29
30th Energy Level
737.70 kJ/mol  
20
719.00 kJ/mol  
23
Electrochemical Equivalent
0.45 g/amp-hr  
99+
1.28 g/amp-hr  
99+
Electron Work Function
3.66 eV  
40
4.98 eV  
10
Other Chemical Properties
Corrosion, Highly Inflammable, Ionization, Solubility  
Anti Corrosion, Ionization, Radioactive Isotopes  
Atomic
Atomic Number
12  
99+
45  
99+
Electron Configuration
[Ne] 3s2  
[Kr] 4d8 5s1  
Crystal Structure
Hexagonal Close Packed (HCP)  
Face Centered Cubic (FCC)  
Crystal Lattice
HCP-Crystal-Structure-of-Magnesium.jpg#100  
FCC-Crystal-Structure-of-Rhodium.jpg#100  
Atom
  
  
Number of Protons
12  
99+
45  
99+
Number of Neutrons
12  
99+
58  
99+
Number of Electrons
12  
99+
45  
99+
Radius of an Atom
  
  
Atomic Radius
160.00 pm  
29
134.00 pm  
99+
Covalent Radius
141.00 pm  
99+
142.00 pm  
99+
Van der Waals Radius
173.00 pm  
99+
200.00 pm  
35
Atomic Weight
24.31 amu  
99+
102.91 amu  
99+
Atomic Volume
13.97 cm3/mol  
99+
8.30 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Sodium
  
Ruthenium
  
Next Element
Aluminium
  
Palladium
  
Valence Electron Potential
40.00 (-eV)  
99+
64.00 (-eV)  
22
Lattice Constant
320.94 pm  
99+
380.34 pm  
30
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, π/2  
Lattice C/A Ratio
1.62  
15
1.73  
7
Mechanical
Density
  
  
Density At Room Temperature
1.74 g/cm3  
99+
12.41 g/cm3  
30
Density When Liquid (at m.p.)
1.58 g/cm3  
99+
10.70 g/cm3  
35
Tensile Strength
150.00 MPa  
25
951.00 MPa  
5
Viscosity
0.00  
24
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
22
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
30
0.02 (Pa)  
19
Elasticity properties
  
  
Shear Modulus
17.00 GPa  
99+
150.00 GPa  
6
Bulk Modulus
45.00 GPa  
29
275.00 GPa  
5
Young's Modulus
45.00 GPa  
99+
380.00 GPa  
5
Poisson Ratio
0.29  
15
0.26  
22
Other Mechanical Properties
-  
Malleable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
1.74  
99+
12.41  
32
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
8
0.00 H/m  
17
Susceptibility
0.00  
33
0.00  
24
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
43.90 nΩ·m  
99+
43.30 nΩ·m  
99+
Electrical Conductivity
0.23 106/cm Ω  
7
0.21 106/cm Ω  
8
Electron Affinity
0.00 kJ/mol  
99+
109.70 kJ/mol  
8
Thermal
Specific Heat
1.02 J/(kg K)  
4
0.24 J/(kg K)  
22
Molar Heat Capacity
24.87 J/mol·K  
99+
24.98 J/mol·K  
99+
Thermal Conductivity
156.00 W/m·K  
8
150.00 W/m·K  
9
Critical Temperature
923.00 K  
99+
2,237.00 K  
13
Thermal Expansion
24.80 µm/(m·K)  
15
8.20 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
128.70 kJ/mol  
99+
495.40 kJ/mol  
16
Enthalpy of Fusion
8.95 kJ/mol  
99+
21.76 kJ/mol  
10
Enthalpy of Atomization
148.50 kJ/mol  
99+
556.50 kJ/mol  
16
Standard Molar Entropy
32.70 J/mol.K  
99+
31.50 J/mol.K  
99+
Periodic Table >>
<< All

Compare Alkali Metals

Alkali Metals

Alkali Metals

» More Alkali Metals

Compare Alkali Metals

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