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Roentgenium Osmium Comparison

Roentgenium
Osmium
Osmium Roentgenium comparison


Periodic Table
Symbol
Rg   
Os   
Group Number
11   
7
8   
10
Period Number
7   
6   
Block
d block   
d block   
Element Family
Unknown   
Transition Metal   
CAS Number
54386242   
1
7440042   
99+
Space Group Name
Not Available   
P63/mmc   
Space Group Number
194.00   
5
194.00   
5
Facts
Interesting Facts
Not Available   
  • Osmium metal does not oxidize in air unless it is heated.
  • But if it heated den it forms Osmium Tetroxide, which is highly toxic.
  
Sources
Synthetically Produced   
Found As a By-product, Found in Minerals, Mining   
History
  
  
Who Discovered
Gesellschaft für Schwerionenforschung   
Smithson Tennant   
Discovery
In 1994   
In 1803   
Abundance
  
  
Abundance In Universe
Not Available   
3 * 10-7 %   
21
Abundance In Sun
~-9999 %   
~0.0000002 %   
25
Abundance In Meteorites
Not Available   
0.00 %   
28
Abundance In Earth's Crust
Not Available   
0.00 %   
99+
Uses
Uses & Benefits
  • Currently known uses of Roentgenium metal are limited to research purpose only.
  
  • Its has very limited uses and its alloys are very hard and are used in the manufacturing of pen tips, pivots, needles and electrical contacts.
  • It is also used as industrial catalyst to speed up the chemical reaction.
  
Industrial Uses
NA   
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry   
Medical Uses
NA   
NA   
Other Uses
Research Purposes   
Alloys   
Biological Properties
  
  
Toxicity
Unknown   
Highly Toxic   
Present in Human Body
No   
No   
In Blood
0.00 Blood/mg dm-3   
37
Not Available   
In Bone
0.00 p.p.m.   
36
Not Available   
Physical Properties
Melting Point
Not Available   
3,045.00 °C   
3
Boiling Point
Not Available   
5,027.00 °C   
6
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silver   
Silvery Bluish-Gray   
Luster
Unknown Luster   
Metallic   
Hardness
  
  
Mohs Hardness
Not Available   
7.00   
3
Brinell Hardness
Not Available   
3,490.00 MPa   
1
Speed of Sound
Not Available   
4,940.00 m/s   
11
Optical Properties
  
  
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
Rg   
Os   
Isotopes
  
  
Known Isotopes
1   
34
35   
4
Electronegativity
  
  
Pauling Electronegativity
Not Available   
2.20   
4
Allred Rochow Electronegativity
Not Available   
1.52   
12
Allen Electronegativity
Not Available   
1.65   
19
Electropositivity
  
  
Pauling Electropositivity
Not Available   
1.80   
99+
Ionization Energies
  
  
1st Energy Level
1,022.70 kJ/mol   
3
840.00 kJ/mol   
12
2nd Energy Level
2,074.40 kJ/mol   
10
1,309.80 kJ/mol   
99+
3rd Energy Level
3,077.90 kJ/mol   
24
1,600.00 kJ/mol   
99+
4th Energy Level
4,052.40 kJ/mol   
36
Not Available   
5th Energy Level
5,306.70 kJ/mol   
31
Not Available   
Electrochemical Equivalent
Not Available   
1.77 g/amp-hr   
38
Electron Work Function
Not Available   
4.83 eV   
8
Other Chemical Properties
NA   
Chemical Stability, Ionization, Solubility   
Atomic Properties
Atomic Number
111   
7
76   
40
Electron Configuration
[Rn] 5f14 6d9 7s2   
[Xe] 4f14 5d6 6s2   
Crystal Structure
Body Centered Cubic (BCC)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
111   
7
76   
39
Number of Neutrons
161   
3
114   
25
Number of Electrons
111   
7
76   
39
Radius of an Atom
  
  
Atomic Radius
Not Available   
133.80 pm   
99+
Van der Waals Radius
Not Available   
216.00 pm   
24
Atomic Weight
281.00 amu   
6
190.23 amu   
35
Atomic Volume
Not Available   
8.49 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Darmstadtium
  
Rhenium
  
Next Element
Copernicium
  
Iridium
  
Valence Electron Potential
Not Available   
91.40 (-eV)   
12
Lattice Constant
Not Available   
273.44 pm   
99+
Lattice Angles
NA   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
1.58   
14
Mechanical Properties
Density
  
  
Density At Room Temperature
28.70 g/cm3   
6
22.59 g/cm3   
9
Density When Liquid (at m.p.)
Not Available   
20.00 g/cm3   
1
Tensile Strength
Not Available   
1,000.00 MPa   
4
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 2000 K
Not Available   
0.00 (Pa)   
28
Elasticity properties
  
  
Shear Modulus
Not Available   
222.00 GPa   
1
Bulk Modulus
Not Available   
462.00 GPa   
1
Poisson Ratio
Not Available   
0.25   
24
Other Mechanical Properties
Unknown   
Ductile   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
Not Available   
22.57   
2
Magnetic Ordering
Unknown   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Unknown   
Conductor   
Resistivity
Not Available   
81.20 nΩ·m   
35
Electrical Conductivity
Not Available   
0.11 106/cm Ω   
18
Electron Affinity
Not Available   
106.10 kJ/mol   
9
Thermal Properties
Specific Heat
Not Available   
0.13 J/(kg K)   
39
Molar Heat Capacity
Not Available   
24.70 J/mol·K   
99+
Thermal Conductivity
Not Available   
87.60 W/m·K   
19
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
Not Available   
5.10 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Vaporization
Not Available   
627.60 kJ/mol   
7
Enthalpy of Fusion
Not Available   
29.30 kJ/mol   
4
Enthalpy of Atomization
Not Available   
669.00 kJ/mol   
6
Standard Molar Entropy
Not Available   
32.60 J/mol.K   
99+
Summary >>
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