Rhenium vs Curium
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
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
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