Rhenium vs Magnesium
Periodic Table
Symbol
Re
Mg
Group Number
7
11
2
16
Period Number
6
3
Block
d block
s block
Element Family
Transition Metal
Alkaline Earth
CAS Number
7440155
99+
7439954
99+
Space Group Name
P63/mmc
P63/mmc
Space Group Number
194.00
5
194.00
5
Facts
Interesting Facts
- Chemical properties of Rhenium are similar to Manganese.
- Rhenium metal is created while refining Molybdenum.
- Magnesium ions are present in every chlorophyll of every green plant .
- Controlling Magnesium fire by pouring water on it will result in explosions.
Sources
Found in Minerals, Mining, Ores of Minerals
By Electrolysis Process, In Ocean, Mining
History
Who Discovered
Masataka Ogawa
Joseph Black
Discovery
In 1908
In 1755
Abundance
Abundance In Universe
2 * 10-8 %
29
6 * 10-2 %
2
Abundance In Sun
~0.00000001 %
29
~0.07 %
2
Abundance In Meteorites
0.00 %
99+
12.00 %
2
Abundance In Earth's Crust
0.00 %
99+
2.90 %
4
Abundance In Oceans
0.00 %
34
0.13 %
2
Abundance In Humans
Not Available
0.03 %
4
Uses
Uses & Benefits
- Alloys of Rhenium are used as an electric contact material. It can resist withstand arc corrosion.
- Its catalysts are used in hydrogenation of fine chemicals. Its Alloy with nickel is used to produce turbine blades.
- 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, Chemical 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
Low Toxic
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
3,180.00 °C
2
650.00 °C
99+
Boiling Point
5,627.00 °C
2
1,107.00 °C
99+
Appearance
Physical State
Solid
Solid
Color
Silvery Gray
Gray
Luster
Metallic
NA
Hardness
Mohs Hardness
7.00
3
2.50
14
Brinell Hardness
1,320.00 MPa
8
260.00 MPa
36
Vickers Hardness
1,350.00 MPa
7
Not Available
Speed of Sound
4,700.00 m/s
15
4,940.00 m/s
11
Optical Properties
Reflectivity
Not Available
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
Re
Mg
Isotopes
Known Isotopes
33
6
15
24
Electronegativity
Pauling Electronegativity
1.90
11
1.31
31
Sanderson Electronegativity
Not Available
1.32
18
Allred Rochow Electronegativity
1.46
15
1.23
25
Mulliken-Jaffe Electronegativity
Not Available
1.37
16
Allen Electronegativity
1.60
21
1.29
35
Electropositivity
Pauling Electropositivity
2.10
99+
2.69
23
Ionization Energies
1st Energy Level
760.00 kJ/mol
20
737.70 kJ/mol
24
2nd Energy Level
1,260.00 kJ/mol
99+
1,450.70 kJ/mol
99+
3rd Energy Level
2,510.00 kJ/mol
99+
7,732.70 kJ/mol
5
4th Energy Level
3,640.00 kJ/mol
99+
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
0.99 g/amp-hr
99+
0.45 g/amp-hr
99+
Electron Work Function
4.96 eV
7
3.66 eV
29
Other Chemical Properties
Corrosion, Ionization, Radioactive Isotopes, Solubility
Corrosion, Highly Inflammable, Ionization, Solubility
Atomic Properties
Atomic Number
75
99+
12
99+
Electron Configuration
[Xe] 4f14 5d5 6s2
[Ne] 3s2
Crystal Structure
Hexagonal Close Packed (HCP)
Hexagonal Close Packed (HCP)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
HCP-Crystal-Structure-of-Magnesium.jpg#100
Atom
Number of Protons
75
40
12
99+
Number of Neutrons
111
26
12
99+
Number of Electrons
75
40
12
99+
Radius of an Atom
Atomic Radius
137.00 pm
40
160.00 pm
27
Covalent Radius
151.00 pm
34
141.00 pm
99+
Van der Waals Radius
200.00 pm
28
173.00 pm
37
Atomic Weight
186.21 amu
36
24.31 amu
99+
Atomic Volume
8.85 cm3/mol
99+
13.97 cm3/mol
37
Adjacent Atomic Numbers
Valence Electron Potential
180.00 (-eV)
3
40.00 (-eV)
99+
Lattice Constant
276.10 pm
99+
320.94 pm
99+
Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, 2 π/3
Lattice C/A Ratio
1.62
3
Not Available
Mechanical Properties
Density
Density At Room Temperature
21.02 g/cm3
12
1.74 g/cm3
99+
Density When Liquid (at m.p.)
18.90 g/cm3
4
1.58 g/cm3
99+
Tensile Strength
1,070.00 MPa
3
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 2000 K
0.00 (Pa)
29
Not Available
Elasticity properties
Shear Modulus
178.00 GPa
3
17.00 GPa
37
Bulk Modulus
370.00 GPa
2
45.00 GPa
25
Young's Modulus
463.00 GPa
2
45.00 GPa
39
Poisson Ratio
0.30
14
0.29
15
Other Mechanical Properties
Ductile, Malleable
NA
Magnetic Properties
Magnetic Characteristics
Specific Gravity
21.02
5
1.74
99+
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Conductor
Conductor
Resistivity
193.00 nΩ·m
20
43.90 nΩ·m
99+
Electrical Conductivity
0.05 106/cm Ω
33
0.23 106/cm Ω
7
Electron Affinity
14.50 kJ/mol
35
0.00 kJ/mol
40
Thermal Properties
Specific Heat
0.13 J/(kg K)
39
1.02 J/(kg K)
4
Molar Heat Capacity
25.48 J/mol·K
38
24.87 J/mol·K
99+
Thermal Conductivity
48.00 W/m·K
31
156.00 W/m·K
8
Critical Temperature
Not Available
Not Available
Thermal Expansion
6.20 µm/(m·K)
99+
24.80 µm/(m·K)
15
Enthalpy
Enthalpy of Vaporization
707.10 kJ/mol
3
128.70 kJ/mol
99+
Enthalpy of Fusion
33.05 kJ/mol
2
8.95 kJ/mol
39
Enthalpy of Atomization
791.00 kJ/mol
2
148.50 kJ/mol
99+
Standard Molar Entropy
36.90 J/mol.K
99+
32.70 J/mol.K
99+
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