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Silver vs Roentgenium

Silver
Roentgenium
Roentgenium vs Silver


Periodic Table
Symbol
Ag  
Rg  
Group Number
11  
7
11  
7
Period Number
5  
7  
Block
d block  
d block  
Element Family
Transition Metal  
-  
CAS Number
7440224  
99+
54386242  
1
Space Group Name
Fm_ 3m  
-  
Space Group Number
225.00  
3
194.00  
7
Facts
Interesting Facts
  • 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.
  
Roentgenium is a highly unstable synthetic element.  
Sources
Earth's crust, Found in Minerals, Ores of metals  
Synthetically Produced  
History
  
  
Who Discovered
-  
Gesellschaft für Schwerionenforschung  
Discovery
Before 5000 BC  
In 1994  
Abundance
  
  
Abundance In Universe
0.00 %  
27
0.00 %  
40
Abundance In Sun
0.00 %  
26
-  
Abundance In Meteorites
0.00 %  
38
-  
Abundance In Earth's Crust
0.00 %  
99+
-  
Abundance In Oceans
0.00 %  
19
-  
Abundance In Humans
0.00 %  
24
-  
Uses
Uses & Benefits
  • Silver is mainly used for Jewelry and show piece.
  • It is used for manufacturing high quality mirrors due to its reflectivity property.
  
  • Currently known uses of Roentgenium metal are limited to research purpose only.
  
Industrial Uses
Chemical Industry, Clothing Industry, Electrical Industry  
-  
Medical Uses
Dentistry, Pharmaceutical Industry  
-  
Other Uses
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues  
Research Purposes  
Biological Properties
  
  
Toxicity
Non Toxic  
-  
Present in Human Body
Yes  
No  
In Blood
0.00 Blood/mg dm-3  
29
0.00 Blood/mg dm-3  
40
In Bone
0.44 p.p.m.  
24
0.00 p.p.m.  
99+
Physical
Melting Point
961.93 °C  
99+
-  
Boiling Point
2,212.00 °C  
99+
2,800.00 °C  
38
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silver  
Luster
Metallic  
Unknown Luster  
Hardness
  
  
Mohs Hardness
2.50  
15
-  
Brinell Hardness
251.00 MPa  
99+
700.00 MPa  
17
Vickers Hardness
229.00 MPa  
99+
450.00 MPa  
38
Speed of Sound
2,680.00 m/s  
99+
3,430.00 m/s  
32
Optical Properties
  
  
Refractive Index
0.16  
99+
1.30  
99+
Reflectivity
97.00 %  
1
64.00 %  
19
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ag  
Rg  
Isotopes
  
  
Known Isotopes
36  
3
1  
34
Electronegativity
  
  
Pauling Electronegativity
1.93  
10
0.00  
99+
Sanderson Electronegativity
1.83  
14
1.90  
13
Allred Rochow Electronegativity
1.42  
19
1.30  
25
Mulliken-Jaffe Electronegativity
1.47  
28
0.90  
99+
Allen Electronegativity
1.87  
10
0.80  
99+
Electropositivity
  
  
Pauling Electropositivity
2.07  
99+
2.20  
39
Ionization Energies
  
  
1st Energy Level
731.00 kJ/mol  
27
1,022.70 kJ/mol  
3
2nd Energy Level
2,070.00 kJ/mol  
11
2,074.40 kJ/mol  
10
3rd Energy Level
3,361.00 kJ/mol  
19
3,077.90 kJ/mol  
24
4th Energy Level
7,310.00 kJ/mol  
10
4,052.40 kJ/mol  
99+
5th Energy Level
7,310.00 kJ/mol  
24
5,306.70 kJ/mol  
99+
6th Energy Level
7,310.00 kJ/mol  
39
11,100.00 kJ/mol  
10
7th Energy level
7,310.00 kJ/mol  
33
5,800.00 kJ/mol  
99+
8th Energy Level
7,310.00 kJ/mol  
31
5,800.00 kJ/mol  
99+
9th Energy Level
7,310.00 kJ/mol  
27
5,650.00 kJ/mol  
99+
10th Energy Level
7,310.00 kJ/mol  
32
5,800.00 kJ/mol  
99+
11th Energy Level
7,310.00 kJ/mol  
31
8,300.00 kJ/mol  
24
12th Energy Level
7,310.00 kJ/mol  
99+
8,300.00 kJ/mol  
99+
13th Energy Level
7,310.00 kJ/mol  
25
8,700.00 kJ/mol  
16
14th Energy Level
731.00 kJ/mol  
99+
8,300.00 kJ/mol  
16
15th Energy Level
73,100.00 kJ/mol  
22
87,000.00 kJ/mol  
9
16th Energy Level
73,100.00 kJ/mol  
17
83,000.00 kJ/mol  
11
17th Energy Level
731.00 kJ/mol  
38
830.80 kJ/mol  
30
18th Energy Level
7,310.00 kJ/mol  
28
8,300.00 kJ/mol  
19
19th Energy Level
731.00 kJ/mol  
35
580.00 kJ/mol  
99+
20th Energy Level
731.00 kJ/mol  
29
580.00 kJ/mol  
99+
21st Energy Level
731.00 kJ/mol  
99+
5,800.00 kJ/mol  
21
22nd Energy Level
731.00 kJ/mol  
23
580.00 kJ/mol  
99+
23rd Energy Level
731.00 kJ/mol  
99+
5,800.00 kJ/mol  
21
24th Energy Level
731.00 kJ/mol  
22
538.70 kJ/mol  
99+
25th Energy Level
731.00 kJ/mol  
22
0.00 kJ/mol  
99+
26th Energy Level
731.00 kJ/mol  
22
580.00 kJ/mol  
99+
27th Energy Level
731.00 kJ/mol  
21
580.00 kJ/mol  
99+
28th Energy Level
731.00 kJ/mol  
27
880.00 kJ/mol  
8
29th Energy Level
731.00 kJ/mol  
28
580.00 kJ/mol  
99+
30th Energy Level
731.00 kJ/mol  
22
0.00 kJ/mol  
99+
Electrochemical Equivalent
4.02 g/amp-hr  
7
3.10 g/amp-hr  
18
Electron Work Function
4.26 eV  
27
4.90 eV  
12
Other Chemical Properties
Chemical Stability, Ionization, Solubility  
-  
Atomic
Atomic Number
47  
99+
111  
7
Electron Configuration
[Kr] 4d10 5s1  
[Rn] 5f14 6d9 7s2  
Crystal Structure
Face Centered Cubic (FCC)  
Body Centered Cubic (BCC)  
Crystal Lattice
FCC-Crystal-Structure-of-Silver.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
47  
99+
111  
7
Number of Neutrons
61  
99+
161  
4
Number of Electrons
47  
99+
111  
7
Radius of an Atom
  
  
Atomic Radius
144.00 pm  
38
200.00 pm  
7
Covalent Radius
145.00 pm  
99+
126.00 pm  
99+
Van der Waals Radius
172.00 pm  
99+
280.00 pm  
6
Atomic Weight
107.87 amu  
99+
281.00 amu  
6
Atomic Volume
10.30 cm3/mol  
99+
28.70 cm3/mol  
12
Adjacent Atomic Numbers
  
  
Previous Element
Palladium
  
Darmstadtium
  
Next Element
Cadmium
  
Copernicium
  
Valence Electron Potential
11.40 (-eV)  
99+
11.90 (-eV)  
99+
Lattice Constant
408.53 pm  
23
0.00 pm  
99+
Lattice Angles
π/2, π/2, π/2  
-  
Lattice C/A Ratio
1.59  
26
1.90  
1
Mechanical
Density
  
  
Density At Room Temperature
10.49 g/cm3  
37
28.70 g/cm3  
6
Density When Liquid (at m.p.)
9.32 g/cm3  
99+
28.70 g/cm3  
7
Tensile Strength
170.00 MPa  
21
65.00 MPa  
33
Viscosity
0.00  
23
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
14
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
38
0.00 (Pa)  
99+
Elasticity properties
  
  
Shear Modulus
30.00 GPa  
27
26.00 GPa  
36
Bulk Modulus
100.00 GPa  
16
0.00 GPa  
99+
Young's Modulus
83.00 GPa  
25
12.70 GPa  
99+
Poisson Ratio
0.37  
7
0.30  
14
Other Mechanical Properties
Ductile, Malleable  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
10.50  
39
28.70  
8
Magnetic Ordering
Diamagnetic  
-  
Permeability
0.00 H/m  
17
0.00 H/m  
12
Susceptibility
0.00  
32
0.00  
24
Electrical Properties
  
  
Electrical Property
Conductor  
-  
Resistivity
15.87 nΩ·m  
99+
0.20 nΩ·m  
99+
Electrical Conductivity
0.63 106/cm Ω  
1
0.00 106/cm Ω  
99+
Electron Affinity
125.60 kJ/mol  
5
50.00 kJ/mol  
26
Thermal
Specific Heat
0.24 J/(kg K)  
25
0.13 J/(kg K)  
40
Molar Heat Capacity
25.35 J/mol·K  
99+
23.70 J/mol·K  
99+
Thermal Conductivity
429.00 W/m·K  
1
0.10 W/m·K  
99+
Critical Temperature
1,235.00 K  
99+
1,100.00 K  
99+
Thermal Expansion
18.90 µm/(m·K)  
25
12.60 µm/(m·K)  
40
Enthalpy
  
  
Enthalpy of Vaporization
255.10 kJ/mol  
99+
580.00 kJ/mol  
12
Enthalpy of Fusion
11.30 kJ/mol  
37
-  
Enthalpy of Atomization
284.50 kJ/mol  
99+
580.00 kJ/mol  
14
Standard Molar Entropy
42.60 J/mol.K  
99+
57.00 J/mol.K  
30
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