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Actinium Osmium Comparison

Actinium
Osmium
Osmium Actinium comparison


Periodic Table
Symbol
Ac   
Os   
Group Number
Not Available   
8   
10
Period Number
7   
6   
Block
f block   
d block   
Element Family
Actinide   
Transition Metal   
CAS Number
7440348   
99+
7440042   
99+
Space Group Name
Fm_ 3m   
P63/mmc   
Space Group Number
225.00   
2
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
Obtained by Treating Radium with Neutrons, Ores of metals   
Found As a By-product, Found in Minerals, Mining   
History
  
  
Who Discovered
Friedrich Oskar Giesel   
Smithson Tennant   
Discovery
In 1902   
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
  • Actinium metal has a great source of alpha rays but it is hardly used outside research purpose.
  
  • 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
Alloys, Nuclear Research, Research Purposes   
Alloys   
Biological Properties
  
  
Toxicity
Toxic   
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
1,227.00 °C   
38
3,045.00 °C   
3
Boiling Point
3,200.00 °C   
26
5,027.00 °C   
6
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Silvery Bluish-Gray   
Luster
NA   
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
Ac   
Os   
Isotopes
  
  
Known Isotopes
29   
10
35   
4
Electronegativity
  
  
Pauling Electronegativity
1.10   
99+
2.20   
4
Allred Rochow Electronegativity
1.00   
36
1.52   
12
Allen Electronegativity
Not Available   
1.65   
19
Electropositivity
  
  
Pauling Electropositivity
2.90   
10
1.80   
99+
Ionization Energies
  
  
1st Energy Level
499.00 kJ/mol   
99+
840.00 kJ/mol   
12
2nd Energy Level
1,170.00 kJ/mol   
99+
1,309.80 kJ/mol   
99+
3rd Energy Level
1,900.00 kJ/mol   
99+
1,600.00 kJ/mol   
99+
4th Energy Level
4,700.00 kJ/mol   
23
Not Available   
Electrochemical Equivalent
2.82 g/amp-hr   
18
1.77 g/amp-hr   
38
Electron Work Function
Not Available   
4.83 eV   
8
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Chemical Stability, Ionization, Solubility   
Atomic Properties
Atomic Number
89   
29
76   
40
Electron Configuration
[Rn] 6d1 7s2   
[Xe] 4f14 5d6 6s2   
Crystal Structure
Face Centered Cubic (FCC)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
FCC-Crystal-Structure-of-Actinium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
89   
29
76   
39
Number of Neutrons
138   
16
114   
25
Number of Electrons
89   
29
76   
39
Radius of an Atom
  
  
Atomic Radius
195.00 pm   
7
133.80 pm   
99+
Van der Waals Radius
Not Available   
216.00 pm   
24
Atomic Weight
227.00 amu   
25
190.23 amu   
35
Atomic Volume
22.54 cm3/mol   
11
8.49 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Radium
  
Rhenium
  
Next Element
Thorium
  
Iridium
  
Valence Electron Potential
38.60 (-eV)   
99+
91.40 (-eV)   
12
Lattice Constant
567.00 pm   
8
273.44 pm   
99+
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
1.58   
14
Mechanical Properties
Density
  
  
Density At Room Temperature
10.00 g/cm3   
37
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
NA   
Ductile   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
10.07   
28
22.57   
2
Magnetic Ordering
Paramagnetic   
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
0.12 J/(kg K)   
40
0.13 J/(kg K)   
39
Molar Heat Capacity
27.20 J/mol·K   
18
24.70 J/mol·K   
99+
Thermal Conductivity
12.00 W/m·K   
99+
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
301.00 kJ/mol   
36
669.00 kJ/mol   
6
Standard Molar Entropy
56.50 J/mol.K   
25
32.60 J/mol.K   
99+
Summary >>
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