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Gold vs Rhenium

Gold
Rhenium
Rhenium vs Gold


Periodic Table
Symbol
Au  
Re  
Group Number
11  
7
7  
11
Period Number
6  
6  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
7440575  
31
7440155  
99+
Space Group Name
Fm_ 3m  
P63/mmc  
Space Group Number
225.00  
3
194.00  
7
Facts
Interesting Facts
  • It is found in copper ores and from the crust of the earth.
  • It is the most malleable and ductile metal.
  • Gold alloys are used in Dentistry as fillings, crowning, clips, etc. It is also used as an artificial limb joints.
  
  • Chemical properties of Rhenium are similar to Manganese.
  • Rhenium metal is created while refining Molybdenum.
  
Sources
Earth's crust, Mining, Ores of metals  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
-  
Masataka Ogawa  
Discovery
Before 6000 BCE  
In 1908  
Abundance
  
  
Abundance In Universe
0.00 %  
27
0.00 %  
30
Abundance In Sun
0.00 %  
26
0.00 %  
29
Abundance In Meteorites
0.00 %  
99+
0.00 %  
99+
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
99+
Abundance In Oceans
0.00 %  
21
0.00 %  
34
Abundance In Humans
0.00 %  
21
0.00 %  
24
Uses
Uses & Benefits
  • Gold metal is mainly used for Jewelry, bullion, coinage, etc.
  • It is used in the art, decoration, ornaments, etc. It is also used for electroplating process.
  
  • 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.
  
Industrial Uses
Chemical Industry, Clothing Industry, Electrical Industry, Electronic Industry  
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry  
Medical Uses
Dentistry, Pharmaceutical Industry  
-  
Other Uses
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues  
Alloys  
Biological Properties
  
  
Toxicity
Non Toxic  
Low Toxic  
Present in Human Body
Yes  
No  
In Blood
0.00 Blood/mg dm-3  
38
0.00 Blood/mg dm-3  
37
In Bone
0.02 p.p.m.  
35
0.00 p.p.m.  
99+
Physical
Melting Point
1,064.43 °C  
99+
3,180.00 °C  
2
Boiling Point
2,807.00 °C  
37
5,627.00 °C  
2
Appearance
  
  
Physical State
Solid  
Solid  
Color
Gold  
Silvery Gray  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
2.50  
15
7.00  
3
Brinell Hardness
194.00 MPa  
99+
1,320.00 MPa  
8
Vickers Hardness
216.00 MPa  
99+
1,350.00 MPa  
12
Speed of Sound
2,030.00 m/s  
99+
4,700.00 m/s  
19
Optical Properties
  
  
Refractive Index
0.47  
99+
1.90  
18
Reflectivity
95.00 %  
2
70.00 %  
13
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Au  
Re  
Isotopes
  
  
Known Isotopes
36  
3
33  
6
Electronegativity
  
  
Pauling Electronegativity
2.54  
2
1.90  
12
Sanderson Electronegativity
1.50  
18
1.90  
13
Allred Rochow Electronegativity
1.42  
19
1.46  
16
Mulliken-Jaffe Electronegativity
1.87  
15
1.90  
13
Allen Electronegativity
1.92  
7
1.60  
24
Electropositivity
  
  
Pauling Electropositivity
1.46  
99+
2.10  
99+
Ionization Energies
  
  
1st Energy Level
890.10 kJ/mol  
8
760.00 kJ/mol  
20
2nd Energy Level
1,980.00 kJ/mol  
12
1,260.00 kJ/mol  
99+
3rd Energy Level
2,856.00 kJ/mol  
33
2,510.00 kJ/mol  
99+
4th Energy Level
890.10 kJ/mol  
99+
3,640.00 kJ/mol  
99+
5th Energy Level
8,901.00 kJ/mol  
6
7,600.00 kJ/mol  
20
6th Energy Level
8,901.00 kJ/mol  
24
7,600.00 kJ/mol  
37
7th Energy level
8,901.00 kJ/mol  
21
7,600.00 kJ/mol  
31
8th Energy Level
8,900.00 kJ/mol  
20
5,560.00 kJ/mol  
99+
9th Energy Level
8,901.00 kJ/mol  
20
5,560.00 kJ/mol  
99+
10th Energy Level
8,901.00 kJ/mol  
21
7,600.00 kJ/mol  
31
11th Energy Level
8,901.00 kJ/mol  
19
7,600.00 kJ/mol  
30
12th Energy Level
8,900.00 kJ/mol  
39
7,600.00 kJ/mol  
99+
13th Energy Level
8,900.00 kJ/mol  
14
7,600.00 kJ/mol  
23
14th Energy Level
890.10 kJ/mol  
99+
7,600.00 kJ/mol  
20
15th Energy Level
89,000.00 kJ/mol  
7
76,000.00 kJ/mol  
20
16th Energy Level
890.10 kJ/mol  
99+
76,000.00 kJ/mol  
15
17th Energy Level
890.10 kJ/mol  
25
760.10 kJ/mol  
36
18th Energy Level
8,901.00 kJ/mol  
14
7,600.00 kJ/mol  
26
19th Energy Level
890.10 kJ/mol  
23
760.40 kJ/mol  
33
20th Energy Level
890.00 kJ/mol  
13
760.00 kJ/mol  
27
21st Energy Level
890.10 kJ/mol  
35
760.00 kJ/mol  
99+
22nd Energy Level
890.00 kJ/mol  
11
760.00 kJ/mol  
21
23rd Energy Level
890.10 kJ/mol  
38
760.00 kJ/mol  
99+
24th Energy Level
890.10 kJ/mol  
6
760.00 kJ/mol  
18
25th Energy Level
890.00 kJ/mol  
5
760.00 kJ/mol  
18
26th Energy Level
890.10 kJ/mol  
5
760.00 kJ/mol  
18
27th Energy Level
890.10 kJ/mol  
4
760.00 kJ/mol  
17
28th Energy Level
890.10 kJ/mol  
7
760.00 kJ/mol  
23
29th Energy Level
890.10 kJ/mol  
8
760.00 kJ/mol  
24
30th Energy Level
890.10 kJ/mol  
5
760.00 kJ/mol  
18
Electrochemical Equivalent
2.45 g/amp-hr  
25
0.99 g/amp-hr  
99+
Electron Work Function
5.10 eV  
8
4.96 eV  
11
Other Chemical Properties
Chemical Stability, Ionization, Solubility  
Corrosion, Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
79  
37
75  
99+
Electron Configuration
[Xe] 4f14 5d10 6s1  
[Xe] 4f14 5d5 6s2  
Crystal Structure
Face Centered Cubic (FCC)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
FCC-Crystal-Structure-of-Gold.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
79  
37
75  
40
Number of Neutrons
118  
24
111  
27
Number of Electrons
79  
37
75  
40
Radius of an Atom
  
  
Atomic Radius
151.00 pm  
34
137.00 pm  
99+
Covalent Radius
144.00 pm  
99+
151.00 pm  
36
Van der Waals Radius
166.00 pm  
99+
200.00 pm  
35
Atomic Weight
196.97 amu  
33
186.21 amu  
36
Atomic Volume
10.20 cm3/mol  
99+
8.85 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Platinum
  
Tungsten
  
Next Element
Mercury
  
Osmium
  
Valence Electron Potential
43.40 (-eV)  
99+
180.00 (-eV)  
3
Lattice Constant
407.82 pm  
24
276.10 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.61  
18
1.62  
17
Mechanical
Density
  
  
Density At Room Temperature
19.30 g/cm3  
15
21.02 g/cm3  
12
Density When Liquid (at m.p.)
17.31 g/cm3  
16
18.90 g/cm3  
14
Tensile Strength
120.00 MPa  
27
1,070.00 MPa  
3
Viscosity
0.00  
23
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
25
0.00 (Pa)  
37
Vapor Pressure at 2000 K
67.00 (Pa)  
4
0.00 (Pa)  
40
Elasticity properties
  
  
Shear Modulus
27.00 GPa  
34
178.00 GPa  
3
Bulk Modulus
180.00 GPa  
9
370.00 GPa  
2
Young's Modulus
79.00 GPa  
26
463.00 GPa  
2
Poisson Ratio
0.40  
4
0.30  
14
Other Mechanical Properties
Ductile, Malleable  
Ductile, Malleable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
19.32  
17
21.02  
14
Magnetic Ordering
Diamagnetic  
Paramagnetic  
Permeability
0.00 H/m  
10
0.00 H/m  
8
Susceptibility
0.00  
22
0.00  
26
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
2.20 nΩ·m  
99+
193.00 nΩ·m  
20
Electrical Conductivity
0.45 106/cm Ω  
3
0.05 106/cm Ω  
38
Electron Affinity
222.80 kJ/mol  
1
14.50 kJ/mol  
99+
Thermal
Specific Heat
0.13 J/(kg K)  
40
0.13 J/(kg K)  
40
Molar Heat Capacity
25.42 J/mol·K  
99+
25.48 J/mol·K  
99+
Thermal Conductivity
318.00 W/m·K  
3
48.00 W/m·K  
31
Critical Temperature
1,337.00 K  
99+
3,459.00 K  
2
Thermal Expansion
14.20 µm/(m·K)  
29
6.20 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
324.40 kJ/mol  
99+
707.10 kJ/mol  
4
Enthalpy of Fusion
12.55 kJ/mol  
33
33.05 kJ/mol  
2
Enthalpy of Atomization
364.00 kJ/mol  
34
791.00 kJ/mol  
2
Standard Molar Entropy
47.40 J/mol.K  
99+
36.90 J/mol.K  
99+
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