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Rhenium Silver Comparison


Silver Rhenium comparison


Periodic Table

Symbol
Re   
Ag   

Group Number
7   
11
11   
7

Period Number
6   
5   

Block
d block   
d block   

Element Family
Transition Metal   
Transition Metal   

CAS Number
7440155   
99+
7440224   
99+

Space Group Name
P63/mmc   
Fm_ 3m   

Space Group Number
194.00   
5
225.00   
2

Facts

Interesting Facts
  • Chemical properties of Rhenium are similar to Manganese.
  • Rhenium metal is created while refining Molybdenum.
  
  • It is the most reflective element.
  • Silver is the second most ductile metal after Gold.
  • It is also used in Dentistry as a dental alloys for clips and crowning.
  

Sources
Found in Minerals, Mining, Ores of Minerals   
Earth's crust, Found in Minerals, Ores of metals   

History
  
  

Who Discovered
Masataka Ogawa   
Unknown   

Discovery
In 1908   
Before 5000 BC   

Abundance
  
  

Abundance In Universe
2 * 10-8 %   
29
6 * 10-8 %   
26

Abundance In Sun
~0.00000001 %   
29
~0.0000001 %   
26

Abundance In Meteorites
0.00 %   
99+
0.00 %   
38

Abundance In Earth's Crust
0.00 %   
99+
0.00 %   
99+

Abundance In Oceans
0.00 %   
34
0.00 %   
19

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.
  
  • Silver is mainly used for Jewelry and show piece.
  • It is used for manufacturing high quality mirrors due to its reflectivity property.
  

Industrial Uses
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry   
Chemical Industry, Clothing Industry, Electrical Industry   

Medical Uses
NA   
Dentistry, Pharmaceutical Industry   

Other Uses
Alloys   
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues   

Biological Properties
  
  

Toxicity
Low Toxic   
Non Toxic   

Present in Human Body
No   
Yes   

In Blood
Not Available   
0.00 Blood/mg dm-3   
29

In Bone
Not Available   
0.44 p.p.m.   
20

Physical Properties

Melting Point
3,180.00 °C   
2
961.93 °C   
99+

Boiling Point
5,627.00 °C   
2
2,212.00 °C   
99+

Appearance
  
  

Physical State
Solid   
Solid   

Color
Silvery Gray   
Silvery White   

Luster
Metallic   
Metallic   

Hardness
  
  

Mohs Hardness
7.00   
3
2.50   
14

Brinell Hardness
1,320.00 MPa   
8
251.00 MPa   
37

Vickers Hardness
1,350.00 MPa   
7
229.00 MPa   
30

Speed of Sound
4,700.00 m/s   
15
2,680.00 m/s   
34

Optical Properties
  
  

Reflectivity
Not Available   
97.00 %   
1

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   
Ag   

Isotopes
  
  

Known Isotopes
33   
6
36   
3

Electronegativity
  
  

Pauling Electronegativity
1.90   
11
1.93   
9

Sanderson Electronegativity
Not Available   
1.83   
11

Allred Rochow Electronegativity
1.46   
15
1.42   
18

Mulliken-Jaffe Electronegativity
Not Available   
1.47   
15

Allen Electronegativity
1.60   
21
1.87   
7

Electropositivity
  
  

Pauling Electropositivity
2.10   
99+
2.07   
99+

Ionization Energies
  
  

1st Energy Level
760.00 kJ/mol   
20
731.00 kJ/mol   
27

2nd Energy Level
1,260.00 kJ/mol   
99+
2,070.00 kJ/mol   
11

3rd Energy Level
2,510.00 kJ/mol   
99+
3,361.00 kJ/mol   
19

4th Energy Level
3,640.00 kJ/mol   
99+
Not Available   

Electrochemical Equivalent
0.99 g/amp-hr   
99+
4.02 g/amp-hr   
7

Electron Work Function
4.96 eV   
7
4.26 eV   
20

Other Chemical Properties
Corrosion, Ionization, Radioactive Isotopes, Solubility   
Chemical Stability, Ionization, Solubility   

Atomic Properties

Atomic Number
75   
99+
47   
99+

Electron Configuration
[Xe] 4f14 5d5 6s2   
[Kr] 4d10 5s1   

Crystal Structure
Hexagonal Close Packed (HCP)   
Face Centered Cubic (FCC)   

Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
FCC-Crystal-Structure-of-Silver.jpg#100   

Atom
  
  

Number of Protons
75   
40
47   
99+

Number of Neutrons
111   
26
61   
99+

Number of Electrons
75   
40
47   
99+

Radius of an Atom
  
  

Atomic Radius
137.00 pm   
40
144.00 pm   
36

Covalent Radius
151.00 pm   
34
145.00 pm   
39

Van der Waals Radius
200.00 pm   
28
172.00 pm   
38

Atomic Weight
186.21 amu   
36
107.87 amu   
99+

Atomic Volume
8.85 cm3/mol   
99+
10.30 cm3/mol   
99+

Adjacent Atomic Numbers
  
  

Previous Element
Tungsten
  
Palladium
  

Next Element
Osmium
  
Cadmium
  

Valence Electron Potential
180.00 (-eV)   
3
11.40 (-eV)   
99+

Lattice Constant
276.10 pm   
99+
408.53 pm   
20

Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   

Lattice C/A Ratio
1.62   
3
Not Available   

Mechanical Properties

Density
  
  

Density At Room Temperature
21.02 g/cm3   
12
10.49 g/cm3   
35

Density When Liquid (at m.p.)
18.90 g/cm3   
4
9.32 g/cm3   
21

Tensile Strength
1,070.00 MPa   
3
Not Available   

Viscosity
Not Available   
Not Available   

Vapor Pressure
  
  

Vapor Pressure at 1000 K
Not Available   
0.00 (Pa)   
14

Vapor Pressure at 2000 K
0.00 (Pa)   
29
Not Available   

Elasticity properties
  
  

Shear Modulus
178.00 GPa   
3
30.00 GPa   
23

Bulk Modulus
370.00 GPa   
2
100.00 GPa   
16

Young's Modulus
463.00 GPa   
2
83.00 GPa   
23

Poisson Ratio
0.30   
14
0.37   
7

Other Mechanical Properties
Ductile, Malleable   
Ductile, Malleable   

Magnetic Properties

Magnetic Characteristics
  
  

Specific Gravity
21.02   
5
10.50   
26

Magnetic Ordering
Paramagnetic   
Diamagnetic   

Susceptibility
Not Available   
0.00   
5

Electrical Properties
  
  

Electrical Property
Conductor   
Conductor   

Resistivity
193.00 nΩ·m   
20
15.87 nΩ·m   
99+

Electrical Conductivity
0.05 106/cm Ω   
33
0.63 106/cm Ω   
1

Electron Affinity
14.50 kJ/mol   
35
125.60 kJ/mol   
5

Thermal Properties

Specific Heat
0.13 J/(kg K)   
39
0.24 J/(kg K)   
25

Molar Heat Capacity
25.48 J/mol·K   
38
25.35 J/mol·K   
99+

Thermal Conductivity
48.00 W/m·K   
31
429.00 W/m·K   
1

Critical Temperature
Not Available   
Not Available   

Thermal Expansion
6.20 µm/(m·K)   
99+
18.90 µm/(m·K)   
23

Enthalpy
  
  

Enthalpy of Vaporization
707.10 kJ/mol   
3
255.10 kJ/mol   
37

Enthalpy of Fusion
33.05 kJ/mol   
2
11.30 kJ/mol   
31

Enthalpy of Atomization
791.00 kJ/mol   
2
284.50 kJ/mol   
37

Standard Molar Entropy
36.90 J/mol.K   
99+
42.60 J/mol.K   
35

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