Americium Rhenium Comparison
Periodic Table
Symbol
Am
Re
Group Number
Not Available
7
11
Period Number
7
6
Block
f block
d block
Element Family
Actinide
Transition Metal
CAS Number
7440359
99+
7440155
99+
Space Group Name
P63/mmc
P63/mmc
Space Group Number
194.00
5
194.00
5
Facts
Interesting Facts
- Americium metal is produced by bombarding Plutonium with Neutrons.
- Americium metal was discovered as a by-product while testing an atomic bomb (Manhattan Project).
- Chemical properties of Rhenium are similar to Manganese.
- Rhenium metal is created while refining Molybdenum.
Sources
Obtained By Bombarding Plutonium with Neutrons
Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, 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
- Americium metal is used in smoke detection alarms.
- In the future, this metal has a potential to be used in batteries of spacecrafts.
- 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
Alloys, Nuclear Research, Research Purposes
Alloys
Biological Properties
Toxicity
Toxic
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
994.00 °C
99+
3,180.00 °C
2
Boiling Point
2,607.00 °C
99+
5,627.00 °C
2
Appearance
Physical State
Solid
Solid
Color
Silvery White
Silvery Gray
Luster
NA
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
Am
Re
Isotopes
Known Isotopes
16
23
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
578.00 kJ/mol
99+
760.00 kJ/mol
20
2nd Energy Level
1,158.00 kJ/mol
99+
1,260.00 kJ/mol
99+
3rd Energy Level
2,132.00 kJ/mol
99+
2,510.00 kJ/mol
99+
4th Energy Level
3,493.00 kJ/mol
99+
3,640.00 kJ/mol
99+
Electrochemical Equivalent
3.02 g/amp-hr
17
0.99 g/amp-hr
99+
Electron Work Function
Not Available
4.96 eV
7
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Corrosion, Ionization, Radioactive Isotopes, Solubility
Atomic Properties
Atomic Number
95
23
75
99+
Electron Configuration
[Rn] 5f7 7s2
[Xe] 4f14 5d5 6s2
Crystal Structure
Double Hexagonal Close Packed (DHCP)
Hexagonal Close Packed (HCP)
Crystal Lattice
DHCP-Crystal-Structure-of-Americium.jpg#100
BCC-Crystal-Structure-.jpg#100
Atom
Number of Protons
95
23
75
40
Number of Neutrons
148
12
111
26
Number of Electrons
95
23
75
40
Radius of an Atom
Atomic Radius
173.00 pm
21
137.00 pm
40
Covalent Radius
180.00 pm
21
151.00 pm
34
Van der Waals Radius
244.00 pm
10
200.00 pm
28
Atomic Weight
243.00 amu
20
186.21 amu
36
Atomic Volume
17.86 cm3/mol
29
8.85 cm3/mol
99+
Adjacent Atomic Numbers
Valence Electron Potential
44.00 (-eV)
40
180.00 (-eV)
3
Lattice Constant
346.81 pm
99+
276.10 pm
99+
Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, 2 π/3
Lattice C/A Ratio
Not Available
1.62
3
Mechanical Properties
Density
Density At Room Temperature
12.00 g/cm3
30
21.02 g/cm3
12
Density When Liquid (at m.p.)
Not Available
18.90 g/cm3
4
Tensile Strength
Not Available
1,070.00 MPa
3
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 1000 K
0.00 (Pa)
13
Not Available
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
NA
Ductile, Malleable
Magnetic Properties
Magnetic Characteristics
Specific Gravity
13.67
15
21.02
5
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Unknown
Conductor
Resistivity
0.69 nΩ·m
99+
193.00 nΩ·m
20
Electrical Conductivity
0.02 106/cm Ω
99+
0.05 106/cm Ω
33
Electron Affinity
Not Available
14.50 kJ/mol
35
Thermal Properties
Specific Heat
0.11 J/(kg K)
99+
0.13 J/(kg K)
39
Molar Heat Capacity
62.70 J/mol·K
1
25.48 J/mol·K
38
Thermal Conductivity
10.00 W/m·K
99+
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
14.39 kJ/mol
24
33.05 kJ/mol
2
Enthalpy of Atomization
268.00 kJ/mol
40
791.00 kJ/mol
2
Standard Molar Entropy
Not Available
36.90 J/mol.K
99+
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