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Curium vs Rhenium

Curium
Rhenium
Rhenium vs Curium


Periodic Table
Symbol
Cm  
Re  
Group Number
Not Available  
7  
11
Period Number
7  
6  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7440519  
36
7440155  
99+
Space Group Name
Not Available  
P63/mmc  
Space Group Number
Not Available  
194.00  
5
Facts
Interesting Facts
  • Curium metal does not occur free in nature.
  • Curium metal is a synthetically produced metal.
  
  • Chemical properties of Rhenium are similar to Manganese.
  • Rhenium metal is created while refining Molybdenum.
  
Sources
Bombarding Plutonium with Helium Ions  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Glenn T. Seaborg, Ralph A. James, Albert Ghiorso  
Masataka Ogawa  
Discovery
In 1944  
In 1908  
Abundance
  
  
Abundance In Universe
Not Available  
2 * 10-8 %  
29
Abundance In Sun
~-9999 %  
~0.00000001 %  
29
Abundance In Meteorites
Not Available  
0.00 %  
99+
Abundance In Earth's Crust
Not Available  
0.00 %  
99+
Abundance In Oceans
Not Available  
0.00 %  
34
Uses
Uses & Benefits
  • Curium metal is used to provide power to electrical equipment for space missions.
  
  • Alloys of Rhenium are used as an electric contact material. It can resist withstand arc corrosion.
  • Its catalysts are used in hydrogenation of fine chemicals. Its Alloy with nickel is used to produce turbine blades.
  
Industrial Uses
NA  
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry  
Medical Uses
NA  
NA  
Other Uses
Research Purposes  
Alloys  
Biological Properties
  
  
Toxicity
Unknown  
Low 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
1,340.00 °C  
34
3,180.00 °C  
2
Boiling Point
3,110.00 °C  
30
5,627.00 °C  
2
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Silvery Gray  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
Not Available  
7.00  
3
Brinell Hardness
Not Available  
1,320.00 MPa  
8
Vickers Hardness
Not Available  
1,350.00 MPa  
7
Speed of Sound
Not Available  
4,700.00 m/s  
15
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
Cm  
Re  
Isotopes
  
  
Known Isotopes
15  
24
33  
6
Electronegativity
  
  
Pauling Electronegativity
1.30  
32
1.90  
11
Allred Rochow Electronegativity
1.20  
27
1.46  
15
Allen Electronegativity
Not Available  
1.60  
21
Electropositivity
  
  
Pauling Electropositivity
2.70  
22
2.10  
99+
Ionization Energies
  
  
1st Energy Level
581.00 kJ/mol  
99+
760.00 kJ/mol  
20
2nd Energy Level
1,196.00 kJ/mol  
99+
1,260.00 kJ/mol  
99+
3rd Energy Level
2,026.00 kJ/mol  
99+
2,510.00 kJ/mol  
99+
4th Energy Level
3,550.00 kJ/mol  
99+
3,640.00 kJ/mol  
99+
Electrochemical Equivalent
3.07 g/amp-hr  
16
0.99 g/amp-hr  
99+
Electron Work Function
Not Available  
4.96 eV  
7
Other Chemical Properties
Ionization, Radioactive Isotopes  
Corrosion, Ionization, Radioactive Isotopes, Solubility  
Atomic Properties
Atomic Number
96  
22
75  
99+
Electron Configuration
[Rn] 5f7 6d1 7s2  
[Xe] 4f14 5d5 6s2  
Crystal Structure
Double Hexagonal Close Packed (DHCP)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
DHCP-Crystal-Structure-of-Curium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
96  
22
75  
40
Number of Neutrons
151  
10
111  
26
Number of Electrons
96  
22
75  
40
Radius of an Atom
  
  
Atomic Radius
174.00 pm  
20
137.00 pm  
40
Covalent Radius
169.00 pm  
26
151.00 pm  
34
Van der Waals Radius
200.00 pm  
28
200.00 pm  
28
Atomic Weight
247.00 amu  
18
186.21 amu  
36
Atomic Volume
18.28 cm3/mol  
26
8.85 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Americium
  
Tungsten
  
Next Element
Berkelium
  
Osmium
  
Valence Electron Potential
44.50 (-eV)  
38
180.00 (-eV)  
3
Lattice Constant
Not Available  
276.10 pm  
99+
Lattice Angles
NA  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
Not Available  
1.62  
3
Mechanical Properties
Density
  
  
Density At Room Temperature
13.51 g/cm3  
25
21.02 g/cm3  
12
Density When Liquid (at m.p.)
13.85 g/cm3  
10
18.90 g/cm3  
4
Tensile Strength
Not Available  
1,070.00 MPa  
3
Viscosity
Not Available  
Not Available  
Vapor Pressure
  
  
Vapor Pressure at 2000 K
Not Available  
0.00 (Pa)  
29
Elasticity properties
  
  
Shear Modulus
Not Available  
178.00 GPa  
3
Bulk Modulus
Not Available  
370.00 GPa  
2
Young's Modulus
Not Available  
463.00 GPa  
2
Poisson Ratio
Not Available  
0.30  
14
Other Mechanical Properties
Unknown  
Ductile, Malleable  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
13.51  
17
21.02  
5
Magnetic Ordering
Antiferromagnetic  
Paramagnetic  
Electrical Properties
  
  
Electrical Property
Unknown  
Conductor  
Resistivity
1.25 nΩ·m  
99+
193.00 nΩ·m  
20
Electrical Conductivity
Not Available  
0.05 106/cm Ω  
33
Electron Affinity
Not Available  
14.50 kJ/mol  
35
Thermal Properties
Specific Heat
Not Available  
0.13 J/(kg K)  
39
Molar Heat Capacity
Not Available  
25.48 J/mol·K  
38
Thermal Conductivity
Not Available  
48.00 W/m·K  
31
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
Not Available  
6.20 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
Not Available  
707.10 kJ/mol  
3
Enthalpy of Fusion
15.00 kJ/mol  
21
33.05 kJ/mol  
2
Enthalpy of Atomization
Not Available  
791.00 kJ/mol  
2
Standard Molar Entropy
Not Available  
36.90 J/mol.K  
99+
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