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Osmium vs Nobelium

Osmium
Nobelium
Nobelium vs Osmium


Periodic Table
Symbol
Os  
No  
Group Number
8  
10
Not Available  
Period Number
6  
7  
Block
d block  
f block  
Element Family
Transition Metal  
Actinide  
CAS Number
7440042  
99+
10028145  
16
Space Group Name
P63/mmc  
Not Available  
Space Group Number
194.00  
5
Not Available  
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.
  
  • The most stable isotope of Nobelium metal is No-259.
  • No-259 has a half-life of fifty-eight minutes.
  
Sources
Found As a By-product, Found in Minerals, Mining  
Bombarding Curium-246 or Curium-249 with Carbon-12 Nuclei, Found in Minerals, Mining  
History
  
  
Who Discovered
Smithson Tennant  
Joint Institute for Nuclear Research  
Discovery
In 1803  
In 1966  
Abundance
  
  
Abundance In Universe
3 * 10-7 %  
21
Not Available  
Abundance In Sun
~0.0000002 %  
25
~-9999 %  
Abundance In Meteorites
0.00 %  
28
Not Available  
Abundance In Earth's Crust
0.00 %  
99+
Not Available  
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 Nobelium metal are limited to research purpose only.
  
Industrial Uses
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry  
NA  
Medical Uses
NA  
NA  
Other Uses
Alloys  
Research Purposes  
Biological Properties
  
  
Toxicity
Highly Toxic  
Unknown  
Present in Human Body
No  
No  
In Blood
Not Available  
0.00 Blood/mg dm-3  
37
In Bone
Not Available  
0.00 p.p.m.  
36
Physical Properties
Melting Point
3,045.00 °C  
3
827.00 °C  
99+
Boiling Point
5,027.00 °C  
6
Not Available  
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery Bluish-Gray  
Unknown  
Luster
Metallic  
Unknown Luster  
Hardness
  
  
Mohs Hardness
7.00  
3
Not Available  
Brinell Hardness
3,490.00 MPa  
1
Not Available  
Speed of Sound
4,940.00 m/s  
11
Not Available  
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
Os  
No  
Isotopes
  
  
Known Isotopes
35  
4
13  
26
Electronegativity
  
  
Pauling Electronegativity
2.20  
4
1.30  
32
Allred Rochow Electronegativity
1.52  
12
1.20  
27
Allen Electronegativity
1.65  
19
Not Available  
Electropositivity
  
  
Pauling Electropositivity
1.80  
99+
2.70  
22
Ionization Energies
  
  
1st Energy Level
840.00 kJ/mol  
12
642.00 kJ/mol  
99+
2nd Energy Level
1,309.80 kJ/mol  
99+
1,254.00 kJ/mol  
99+
3rd Energy Level
1,600.00 kJ/mol  
99+
2,643.00 kJ/mol  
99+
4th Energy Level
Not Available  
3,956.00 kJ/mol  
39
Electrochemical Equivalent
1.77 g/amp-hr  
38
4.83 g/amp-hr  
4
Electron Work Function
4.83 eV  
8
Not Available  
Other Chemical Properties
Chemical Stability, Ionization, Solubility  
Ionization, Radioactive Isotopes, Radioactivity  
Atomic Properties
Atomic Number
76  
40
102  
16
Electron Configuration
[Xe] 4f14 5d6 6s2  
[Rn] 5f14 7s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Not Known  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
Unknown-Crystal-Structure-of-Nobelium.jpg#100  
Atom
  
  
Number of Protons
76  
39
102  
16
Number of Neutrons
114  
25
157  
7
Number of Electrons
76  
39
102  
16
Radius of an Atom
  
  
Atomic Radius
133.80 pm  
99+
Not Available  
Van der Waals Radius
216.00 pm  
24
246.00 pm  
8
Atomic Weight
190.23 amu  
35
259.00 amu  
13
Atomic Volume
8.49 cm3/mol  
99+
Not Available  
Adjacent Atomic Numbers
  
  
Previous Element
Rhenium
  
Mendelevium
  
Next Element
Iridium
  
Lawrencium
  
Valence Electron Potential
91.40 (-eV)  
12
26.00 (-eV)  
99+
Lattice Constant
273.44 pm  
99+
Not Available  
Lattice Angles
π/2, π/2, 2 π/3  
NA  
Lattice C/A Ratio
1.58  
14
Not Available  
Mechanical Properties
Density
  
  
Density At Room Temperature
22.59 g/cm3  
9
Not Available  
Density When Liquid (at m.p.)
20.00 g/cm3  
1
Not Available  
Tensile Strength
1,000.00 MPa  
4
Not Available  
Viscosity
Not Available  
Not Available  
Vapor Pressure
  
  
Vapor Pressure at 2000 K
0.00 (Pa)  
28
Not Available  
Elasticity properties
  
  
Shear Modulus
222.00 GPa  
1
Not Available  
Bulk Modulus
462.00 GPa  
1
Not Available  
Poisson Ratio
0.25  
24
Not Available  
Other Mechanical Properties
Ductile  
Unknown  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
22.57  
2
Not Available  
Magnetic Ordering
Paramagnetic  
Unknown  
Electrical Properties
  
  
Electrical Property
Conductor  
Unknown  
Resistivity
81.20 nΩ·m  
35
Not Available  
Electrical Conductivity
0.11 106/cm Ω  
18
Not Available  
Electron Affinity
106.10 kJ/mol  
9
Not Available  
Thermal Properties
Specific Heat
0.13 J/(kg K)  
39
Not Available  
Molar Heat Capacity
24.70 J/mol·K  
99+
Not Available  
Thermal Conductivity
87.60 W/m·K  
19
Not Available  
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
5.10 µm/(m·K)  
99+
Not Available  
Enthalpy
  
  
Enthalpy of Vaporization
627.60 kJ/mol  
7
Not Available  
Enthalpy of Fusion
29.30 kJ/mol  
4
Not Available  
Enthalpy of Atomization
669.00 kJ/mol  
6
Not Available  
Standard Molar Entropy
32.60 J/mol.K  
99+
Not Available  
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