Home
 Compare Metals

Actinium vs Osmium

Actinium
Osmium
Osmium vs Actinium


Periodic Table
Symbol
Ac  
Os  
Group Number
3  
15
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  
3
194.00  
7
Facts
Interesting Facts
Actinium glows in the dark due to its radioactivity.  
  • 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
0.00 %  
34
0.00 %  
22
Abundance In Sun
0.00 %  
26
0.00 %  
25
Abundance In Meteorites
0.00 %  
99+
0.00 %  
28
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
99+
Abundance In Oceans
0.00 %  
99+
0.00 %  
99+
Abundance In Humans
0.00 %  
24
0.00 %  
24
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
-  
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry  
Medical Uses
-  
-  
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  
40
0.00 Blood/mg dm-3  
37
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
1,227.00 °C  
38
3,045.00 °C  
3
Boiling Point
3,200.00 °C  
27
5,027.00 °C  
6
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silvery Bluish-Gray  
Luster
-  
Metallic  
Hardness
  
  
Mohs Hardness
6.50  
5
7.00  
3
Brinell Hardness
70.00 MPa  
99+
3,490.00 MPa  
1
Vickers Hardness
260.00 MPa  
99+
3,920.00 MPa  
1
Speed of Sound
3,430.00 m/s  
32
4,940.00 m/s  
15
Optical Properties
  
  
Refractive Index
1.00  
99+
2.07  
12
Reflectivity
62.00 %  
21
80.00 %  
7
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ac  
Os  
Isotopes
  
  
Known Isotopes
29  
10
35  
4
Electronegativity
  
  
Pauling Electronegativity
1.10  
99+
2.20  
5
Sanderson Electronegativity
1.10  
38
2.20  
8
Allred Rochow Electronegativity
1.00  
37
1.52  
13
Mulliken-Jaffe Electronegativity
1.10  
99+
2.20  
6
Allen Electronegativity
1.10  
99+
1.65  
22
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  
33
840.00 kJ/mol  
99+
5th Energy Level
4,990.00 kJ/mol  
99+
8,400.00 kJ/mol  
10
6th Energy Level
5,750.00 kJ/mol  
99+
8,400.00 kJ/mol  
30
7th Energy level
5,750.00 kJ/mol  
99+
8,400.00 kJ/mol  
25
8th Energy Level
5,750.00 kJ/mol  
99+
8,400.00 kJ/mol  
25
9th Energy Level
4,990.00 kJ/mol  
99+
5,280.00 kJ/mol  
99+
10th Energy Level
4,990.00 kJ/mol  
99+
8,400.00 kJ/mol  
26
11th Energy Level
4,990.00 kJ/mol  
99+
8,400.00 kJ/mol  
23
12th Energy Level
49,900.00 kJ/mol  
21
8,400.00 kJ/mol  
99+
13th Energy Level
4,990.00 kJ/mol  
99+
8,400.00 kJ/mol  
18
14th Energy Level
4,990.00 kJ/mol  
99+
840.00 kJ/mol  
99+
15th Energy Level
49,900.00 kJ/mol  
99+
84,000.00 kJ/mol  
12
16th Energy Level
49,900.00 kJ/mol  
99+
840.00 kJ/mol  
99+
17th Energy Level
499.00 kJ/mol  
99+
840.00 kJ/mol  
29
18th Energy Level
4,990.00 kJ/mol  
99+
8,400.00 kJ/mol  
18
19th Energy Level
499.00 kJ/mol  
99+
840.00 kJ/mol  
27
20th Energy Level
499.00 kJ/mol  
99+
840.00 kJ/mol  
19
21st Energy Level
4,990.00 kJ/mol  
25
840.00 kJ/mol  
39
22nd Energy Level
499.00 kJ/mol  
99+
840.00 kJ/mol  
15
23rd Energy Level
4,990.00 kJ/mol  
29
840.00 kJ/mol  
99+
24th Energy Level
499.00 kJ/mol  
99+
840.00 kJ/mol  
11
25th Energy Level
499.00 kJ/mol  
99+
840.00 kJ/mol  
9
26th Energy Level
499.00 kJ/mol  
99+
840.00 kJ/mol  
9
27th Energy Level
499.00 kJ/mol  
99+
713.30 kJ/mol  
24
28th Energy Level
499.00 kJ/mol  
99+
840.10 kJ/mol  
13
29th Energy Level
499.00 kJ/mol  
99+
840.00 kJ/mol  
13
30th Energy Level
499.00 kJ/mol  
99+
840.00 kJ/mol  
9
Electrochemical Equivalent
2.82 g/amp-hr  
22
1.77 g/amp-hr  
99+
Electron Work Function
4.38 eV  
23
4.83 eV  
13
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Chemical Stability, Ionization, Solubility  
Atomic
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  
17
114  
26
Number of Electrons
89  
29
76  
39
Radius of an Atom
  
  
Atomic Radius
195.00 pm  
9
133.80 pm  
99+
Covalent Radius
186.00 pm  
21
128.00 pm  
99+
Van der Waals Radius
215.00 pm  
31
216.00 pm  
30
Atomic Weight
227.00 amu  
25
190.23 amu  
35
Atomic Volume
22.54 cm3/mol  
20
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  
9
273.44 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.89  
2
1.58  
37
Mechanical
Density
  
  
Density At Room Temperature
10.00 g/cm3  
40
22.59 g/cm3  
9
Density When Liquid (at m.p.)
10.07 g/cm3  
40
20.00 g/cm3  
11
Tensile Strength
65.00 MPa  
33
1,000.00 MPa  
4
Viscosity
0.00  
25
0.00  
3
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
22
0.00 (Pa)  
16
Vapor Pressure at 2000 K
0.00 (Pa)  
30
0.00 (Pa)  
39
Elasticity properties
  
  
Shear Modulus
25.00 GPa  
38
222.00 GPa  
1
Bulk Modulus
94.00 GPa  
17
462.00 GPa  
1
Young's Modulus
130.00 GPa  
16
528.00 GPa  
1
Poisson Ratio
0.34  
10
0.25  
24
Other Mechanical Properties
-  
Ductile  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
10.07  
99+
22.57  
11
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
17
Susceptibility
0.00  
24
0.00  
17
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
5.20 nΩ·m  
99+
81.20 nΩ·m  
35
Electrical Conductivity
0.15 106/cm Ω  
13
0.11 106/cm Ω  
21
Electron Affinity
33.20 kJ/mol  
34
106.10 kJ/mol  
10
Thermal
Specific Heat
0.12 J/(kg K)  
99+
0.13 J/(kg K)  
40
Molar Heat Capacity
27.20 J/mol·K  
24
24.70 J/mol·K  
99+
Thermal Conductivity
12.00 W/m·K  
99+
87.60 W/m·K  
19
Critical Temperature
1,323.00 K  
99+
3,300.00 K  
3
Thermal Expansion
12.10 µm/(m·K)  
99+
5.10 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
120.00 kJ/mol  
99+
627.60 kJ/mol  
8
Enthalpy of Fusion
14.20 kJ/mol  
28
29.30 kJ/mol  
4
Enthalpy of Atomization
301.00 kJ/mol  
99+
669.00 kJ/mol  
6
Standard Molar Entropy
56.50 J/mol.K  
33
32.60 J/mol.K  
99+
Periodic Table >>
<< All

Compare Actinide Series

Actinide Series

Actinide Series

» More Actinide Series

Compare Actinide Series

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