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Roentgenium vs Silver

Roentgenium
Silver
Silver vs Roentgenium


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