Home
 Compare Metals

Osmium vs Roentgenium

Osmium
Roentgenium
Roentgenium vs Osmium


Periodic Table
Symbol
Os  
Rg  
Group Number
8  
10
11  
7
Period Number
6  
7  
Block
d block  
d block  
Element Family
Transition Metal  
-  
CAS Number
7440042  
99+
54386242  
1
Space Group Name
P63/mmc  
-  
Space Group Number
194.00  
7
194.00  
7
Facts
Interesting Facts
  • Osmium metal does not oxidize in air unless it is heated.
  • But if it heated den it forms Osmium Tetroxide, which is highly toxic.
  
Roentgenium is a highly unstable synthetic element.  
Sources
Found As a By-product, Found in Minerals, Mining  
Synthetically Produced  
History
  
  
Who Discovered
Smithson Tennant  
Gesellschaft für Schwerionenforschung  
Discovery
In 1803  
In 1994  
Abundance
  
  
Abundance In Universe
0.00 %  
22
0.00 %  
40
Abundance In Sun
0.00 %  
25
-  
Abundance In Meteorites
0.00 %  
28
-  
Abundance In Earth's Crust
0.00 %  
99+
-  
Abundance In Oceans
0.00 %  
99+
-  
Abundance In Humans
0.00 %  
24
-  
Uses
Uses & Benefits
  • 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.
  
  • Currently known uses of Roentgenium metal are limited to research purpose only.
  
Industrial Uses
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry  
-  
Medical Uses
-  
-  
Other Uses
Alloys  
Research Purposes  
Biological Properties
  
  
Toxicity
Highly Toxic  
-  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
37
0.00 Blood/mg dm-3  
40
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
3,045.00 °C  
3
-  
Boiling Point
5,027.00 °C  
6
2,800.00 °C  
38
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery Bluish-Gray  
Silver  
Luster
Metallic  
Unknown Luster  
Hardness
  
  
Mohs Hardness
7.00  
3
-  
Brinell Hardness
3,490.00 MPa  
1
700.00 MPa  
17
Vickers Hardness
3,920.00 MPa  
1
450.00 MPa  
38
Speed of Sound
4,940.00 m/s  
15
3,430.00 m/s  
32
Optical Properties
  
  
Refractive Index
2.07  
12
1.30  
99+
Reflectivity
80.00 %  
7
64.00 %  
19
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Os  
Rg  
Isotopes
  
  
Known Isotopes
35  
4
1  
34
Electronegativity
  
  
Pauling Electronegativity
2.20  
5
0.00  
99+
Sanderson Electronegativity
2.20  
8
1.90  
13
Allred Rochow Electronegativity
1.52  
13
1.30  
25
Mulliken-Jaffe Electronegativity
2.20  
6
0.90  
99+
Allen Electronegativity
1.65  
22
0.80  
99+
Electropositivity
  
  
Pauling Electropositivity
1.80  
99+
2.20  
39
Ionization Energies
  
  
1st Energy Level
840.00 kJ/mol  
12
1,022.70 kJ/mol  
3
2nd Energy Level
1,309.80 kJ/mol  
99+
2,074.40 kJ/mol  
10
3rd Energy Level
1,600.00 kJ/mol  
99+
3,077.90 kJ/mol  
24
4th Energy Level
840.00 kJ/mol  
99+
4,052.40 kJ/mol  
99+
5th Energy Level
8,400.00 kJ/mol  
10
5,306.70 kJ/mol  
99+
6th Energy Level
8,400.00 kJ/mol  
30
11,100.00 kJ/mol  
10
7th Energy level
8,400.00 kJ/mol  
25
5,800.00 kJ/mol  
99+
8th Energy Level
8,400.00 kJ/mol  
25
5,800.00 kJ/mol  
99+
9th Energy Level
5,280.00 kJ/mol  
99+
5,650.00 kJ/mol  
99+
10th Energy Level
8,400.00 kJ/mol  
26
5,800.00 kJ/mol  
99+
11th Energy Level
8,400.00 kJ/mol  
23
8,300.00 kJ/mol  
24
12th Energy Level
8,400.00 kJ/mol  
99+
8,300.00 kJ/mol  
99+
13th Energy Level
8,400.00 kJ/mol  
18
8,700.00 kJ/mol  
16
14th Energy Level
840.00 kJ/mol  
99+
8,300.00 kJ/mol  
16
15th Energy Level
84,000.00 kJ/mol  
12
87,000.00 kJ/mol  
9
16th Energy Level
840.00 kJ/mol  
99+
83,000.00 kJ/mol  
11
17th Energy Level
840.00 kJ/mol  
29
830.80 kJ/mol  
30
18th Energy Level
8,400.00 kJ/mol  
18
8,300.00 kJ/mol  
19
19th Energy Level
840.00 kJ/mol  
27
580.00 kJ/mol  
99+
20th Energy Level
840.00 kJ/mol  
19
580.00 kJ/mol  
99+
21st Energy Level
840.00 kJ/mol  
39
5,800.00 kJ/mol  
21
22nd Energy Level
840.00 kJ/mol  
15
580.00 kJ/mol  
99+
23rd Energy Level
840.00 kJ/mol  
99+
5,800.00 kJ/mol  
21
24th Energy Level
840.00 kJ/mol  
11
538.70 kJ/mol  
99+
25th Energy Level
840.00 kJ/mol  
9
0.00 kJ/mol  
99+
26th Energy Level
840.00 kJ/mol  
9
580.00 kJ/mol  
99+
27th Energy Level
713.30 kJ/mol  
24
580.00 kJ/mol  
99+
28th Energy Level
840.10 kJ/mol  
13
880.00 kJ/mol  
8
29th Energy Level
840.00 kJ/mol  
13
580.00 kJ/mol  
99+
30th Energy Level
840.00 kJ/mol  
9
0.00 kJ/mol  
99+
Electrochemical Equivalent
1.77 g/amp-hr  
99+
3.10 g/amp-hr  
18
Electron Work Function
4.83 eV  
13
4.90 eV  
12
Other Chemical Properties
Chemical Stability, Ionization, Solubility  
-  
Atomic
Atomic Number
76  
40
111  
7
Electron Configuration
[Xe] 4f14 5d6 6s2  
[Rn] 5f14 6d9 7s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Body Centered Cubic (BCC)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
76  
39
111  
7
Number of Neutrons
114  
26
161  
4
Number of Electrons
76  
39
111  
7
Radius of an Atom
  
  
Atomic Radius
133.80 pm  
99+
200.00 pm  
7
Covalent Radius
128.00 pm  
99+
126.00 pm  
99+
Van der Waals Radius
216.00 pm  
30
280.00 pm  
6
Atomic Weight
190.23 amu  
35
281.00 amu  
6
Atomic Volume
8.49 cm3/mol  
99+
28.70 cm3/mol  
12
Adjacent Atomic Numbers
  
  
Previous Element
Rhenium
  
Darmstadtium
  
Next Element
Iridium
  
Copernicium
  
Valence Electron Potential
91.40 (-eV)  
12
11.90 (-eV)  
99+
Lattice Constant
273.44 pm  
99+
0.00 pm  
99+
Lattice Angles
π/2, π/2, 2 π/3  
-  
Lattice C/A Ratio
1.58  
37
1.90  
1
Mechanical
Density
  
  
Density At Room Temperature
22.59 g/cm3  
9
28.70 g/cm3  
6
Density When Liquid (at m.p.)
20.00 g/cm3  
11
28.70 g/cm3  
7
Tensile Strength
1,000.00 MPa  
4
65.00 MPa  
33
Viscosity
0.00  
3
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
16
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
39
0.00 (Pa)  
99+
Elasticity properties
  
  
Shear Modulus
222.00 GPa  
1
26.00 GPa  
36
Bulk Modulus
462.00 GPa  
1
0.00 GPa  
99+
Young's Modulus
528.00 GPa  
1
12.70 GPa  
99+
Poisson Ratio
0.25  
24
0.30  
14
Other Mechanical Properties
Ductile  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
22.57  
11
28.70  
8
Magnetic Ordering
Paramagnetic  
-  
Permeability
0.00 H/m  
17
0.00 H/m  
12
Susceptibility
0.00  
17
0.00  
24
Electrical Properties
  
  
Electrical Property
Conductor  
-  
Resistivity
81.20 nΩ·m  
35
0.20 nΩ·m  
99+
Electrical Conductivity
0.11 106/cm Ω  
21
0.00 106/cm Ω  
99+
Electron Affinity
106.10 kJ/mol  
10
50.00 kJ/mol  
26
Thermal
Specific Heat
0.13 J/(kg K)  
40
0.13 J/(kg K)  
40
Molar Heat Capacity
24.70 J/mol·K  
99+
23.70 J/mol·K  
99+
Thermal Conductivity
87.60 W/m·K  
19
0.10 W/m·K  
99+
Critical Temperature
3,300.00 K  
3
1,100.00 K  
99+
Thermal Expansion
5.10 µm/(m·K)  
99+
12.60 µm/(m·K)  
40
Enthalpy
  
  
Enthalpy of Vaporization
627.60 kJ/mol  
8
580.00 kJ/mol  
12
Enthalpy of Fusion
29.30 kJ/mol  
4
-  
Enthalpy of Atomization
669.00 kJ/mol  
6
580.00 kJ/mol  
14
Standard Molar Entropy
32.60 J/mol.K  
99+
57.00 J/mol.K  
30
Periodic Table >>
<< All

Compare Transition Metals

Transition Metals

Transition Metals

» More Transition Metals

Compare Transition Metals

» More Compare Transition Metals
Home | About | Contact | Disclaimer | Terms of use
© A softusvista inc. venture!