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What is Roentgenium?
Roentgenium


Periodic Table
Symbol
Rg
Group Number
11 7
Period Number
7 1
Block
d block
Element Family
-
CAS Number
54386242 1
Space Group Name
-
Space Group Number
194.00 7
Facts
Interesting Facts
Roentgenium is a highly unstable synthetic element.
Sources
Synthetically Produced
History
Who Discovered
Gesellschaft für Schwerionenforschung
Discovery
In 1994
Abundance
Abundance In Universe
0.00 % 40
Abundance In Sun
-
Abundance In Meteorites
-
Abundance In Earth's Crust
-
Abundance In Oceans
-
Abundance In Humans
-
Uses
Uses & Benefits
  • Currently known uses of Roentgenium metal are limited to research purpose only.
Industrial Uses
-
Medical Uses
-
Other Uses
Research Purposes
Biological Properties
Toxicity
-
Present in Human Body
No
In Blood
0.00 Blood/mg dm-3 40
In Bone
0.00 p.p.m. 41
Physical
Melting Point
-
Boiling Point
2,800.00 °C 38
Appearance
Physical State
Solid
Color
Silver
Luster
Unknown Luster
Hardness
Mohs Hardness
-
Brinell Hardness
700.00 MPa 17
Vickers Hardness
450.00 MPa 38
Speed of Sound
3,430.00 m/s 32
Optical Properties
Refractive Index
1.30 43
Reflectivity
64.00 % 19
Allotropes
No
α Allotropes
-
β Allotropes
-
γ Allotropes
-
Chemical
Chemical Formula
Rg
Isotopes
Known Isotopes
1 34
Electronegativity
Pauling Electronegativity
0.00 55
Sanderson Electronegativity
1.90 13
Allred Rochow Electronegativity
1.30 25
Mulliken-Jaffe Electronegativity
0.90 50
Allen Electronegativity
0.80 63
Electropositivity
Pauling Electropositivity
2.20 39
Ionization Energies
1st Energy Level
1,022.70 kJ/mol 3
2nd Energy Level
2,074.40 kJ/mol 10
3rd Energy Level
3,077.90 kJ/mol 24
4th Energy Level
4,052.40 kJ/mol 46
5th Energy Level
5,306.70 kJ/mol 68
6th Energy Level
11,100.00 kJ/mol 10
7th Energy level
5,800.00 kJ/mol 60
8th Energy Level
5,800.00 kJ/mol 58
9th Energy Level
5,650.00 kJ/mol 61
10th Energy Level
5,800.00 kJ/mol 58
11th Energy Level
8,300.00 kJ/mol 24
12th Energy Level
8,300.00 kJ/mol 43
13th Energy Level
8,700.00 kJ/mol 16
14th Energy Level
8,300.00 kJ/mol 16
15th Energy Level
87,000.00 kJ/mol 9
16th Energy Level
83,000.00 kJ/mol 11
17th Energy Level
830.80 kJ/mol 30
18th Energy Level
8,300.00 kJ/mol 19
19th Energy Level
580.00 kJ/mol 62
20th Energy Level
580.00 kJ/mol 58
21st Energy Level
5,800.00 kJ/mol 21
22nd Energy Level
580.00 kJ/mol 53
23rd Energy Level
5,800.00 kJ/mol 21
24th Energy Level
538.70 kJ/mol 74
25th Energy Level
0.00 kJ/mol 81
26th Energy Level
580.00 kJ/mol 60
27th Energy Level
580.00 kJ/mol 58
28th Energy Level
880.00 kJ/mol 8
29th Energy Level
580.00 kJ/mol 64
30th Energy Level
0.00 kJ/mol 84
Electrochemical Equivalent
3.10 g/amp-hr 18
Electron Work Function
4.90 eV 12
Other Chemical Properties
-
Atomic
Atomic Number
111 7
Electron Configuration
[Rn] 5f14 6d9 7s2
Crystal Structure
Body Centered Cubic (BCC)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
Atom
Number of Protons
111 7
Number of Neutrons
161 4
Number of Electrons
111 7
Radius of an Atom
Atomic Radius
200.00 pm 7
Covalent Radius
126.00 pm 53
Van der Waals Radius
280.00 pm 6
Atomic Weight
281.00 amu 6
Atomic Volume
28.70 cm3/mol 12
Adjacent Atomic Numbers
Previous Element
90
Next Element
71
Valence Electron Potential
11.90 (-eV) 65
Lattice Constant
0.00 pm 77
Lattice Angles
-
Lattice C/A Ratio
1.90 1
Mechanical
Density
Density At Room Temperature
28.70 g/cm3 6
Density When Liquid (at m.p.)
28.70 g/cm3 7
Tensile Strength
65.00 MPa 33
Viscosity
0.00 25
Vapor Pressure
Vapor Pressure at 1000 K
0.00 (Pa) 37
Vapor Pressure at 2000 K
0.00 (Pa) 45
Elasticity properties
Shear Modulus
26.00 GPa 36
Bulk Modulus
0.00 GPa 67
Young's Modulus
12.70 GPa 58
Poisson Ratio
0.30 14
Other Mechanical Properties
-
Magnetic
Magnetic Characteristics
Specific Gravity
28.70 8
Magnetic Ordering
-
Permeability
0.00 H/m 12
Susceptibility
0.00 24
Electrical Properties
Electrical Property
-
Resistivity
0.20 nΩ·m 89
Electrical Conductivity
0.00 106/cm Ω 70
Electron Affinity
50.00 kJ/mol 26
Thermal
Specific Heat
0.13 J/(kg K) 40
Molar Heat Capacity
23.70 J/mol·K 64
Thermal Conductivity
0.10 W/m·K 79
Critical Temperature
1,100.00 K 56
Thermal Expansion
12.60 µm/(m·K) 40
Enthalpy
Enthalpy of Vaporization
580.00 kJ/mol 12
Enthalpy of Fusion
-
Enthalpy of Atomization
580.00 kJ/mol 14
Standard Molar Entropy
57.00 J/mol.K 30
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