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Rhenium Curium Comparison

Rhenium
Curium
Curium Rhenium comparison


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