Nobelium vs Americium
Periodic Table
Symbol
No
Am
Group Number
Not Available
Not Available
Period Number
7
7
Block
f block
f block
Element Family
Actinide
Actinide
CAS Number
10028145
16
7440359
99+
Space Group Name
Not Available
P63/mmc
Space Group Number
Not Available
194.00
5
Facts
Interesting Facts
- The most stable isotope of Nobelium metal is No-259.
- No-259 has a half-life of fifty-eight minutes.
- Americium metal is produced by bombarding Plutonium with Neutrons.
- Americium metal was discovered as a by-product while testing an atomic bomb (Manhattan Project).
Sources
Bombarding Curium-246 or Curium-249 with Carbon-12 Nuclei, Found in Minerals, Mining
Obtained By Bombarding Plutonium with Neutrons
History
Who Discovered
Joint Institute for Nuclear Research
Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso
Discovery
In 1966
In 1944
Abundance
Uses
Uses & Benefits
- Currently known uses of Nobelium metal are limited to research purpose only.
- Americium metal is used in smoke detection alarms.
- In the future, this metal has a potential to be used in batteries of spacecrafts.
Industrial Uses
NA
NA
Medical Uses
NA
NA
Other Uses
Research Purposes
Alloys, Nuclear Research, Research Purposes
Biological Properties
Toxicity
Unknown
Toxic
Present in Human Body
No
No
In Blood
0.00 Blood/mg dm-3
37
0.00 Blood/mg dm-3
37
In Bone
0.00 p.p.m.
36
0.00 p.p.m.
36
Physical Properties
Melting Point
827.00 °C
99+
994.00 °C
99+
Boiling Point
Not Available
2,607.00 °C
99+
Appearance
Physical State
Solid
Solid
Color
Unknown
Silvery White
Luster
Unknown Luster
NA
Hardness
Speed of Sound
Not Available
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
No
Am
Isotopes
Known Isotopes
13
26
16
23
Electronegativity
Pauling Electronegativity
1.30
32
1.30
32
Allred Rochow Electronegativity
1.20
27
1.20
27
Electropositivity
Pauling Electropositivity
2.70
22
2.70
22
Ionization Energies
1st Energy Level
642.00 kJ/mol
99+
578.00 kJ/mol
99+
2nd Energy Level
1,254.00 kJ/mol
99+
1,158.00 kJ/mol
99+
3rd Energy Level
2,643.00 kJ/mol
99+
2,132.00 kJ/mol
99+
4th Energy Level
3,956.00 kJ/mol
39
3,493.00 kJ/mol
99+
Electrochemical Equivalent
4.83 g/amp-hr
4
3.02 g/amp-hr
17
Electron Work Function
Not Available
Not Available
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Atomic Properties
Atomic Number
102
16
95
23
Electron Configuration
[Rn] 5f14 7s2
[Rn] 5f7 7s2
Crystal Structure
Not Known
Double Hexagonal Close Packed (DHCP)
Crystal Lattice
Unknown-Crystal-Structure-of-Nobelium.jpg#100
DHCP-Crystal-Structure-of-Americium.jpg#100
Atom
Number of Protons
102
16
95
23
Number of Neutrons
157
7
148
12
Number of Electrons
102
16
95
23
Radius of an Atom
Atomic Radius
Not Available
173.00 pm
21
Covalent Radius
Not Available
180.00 pm
21
Van der Waals Radius
246.00 pm
8
244.00 pm
10
Atomic Weight
259.00 amu
13
243.00 amu
20
Atomic Volume
Not Available
17.86 cm3/mol
29
Adjacent Atomic Numbers
Valence Electron Potential
26.00 (-eV)
99+
44.00 (-eV)
40
Lattice Constant
Not Available
346.81 pm
99+
Lattice Angles
NA
π/2, π/2, 2 π/3
Lattice C/A Ratio
Not Available
Not Available
Mechanical Properties
Density
Density At Room Temperature
Not Available
12.00 g/cm3
30
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 1000 K
Not Available
0.00 (Pa)
13
Elasticity properties
Poisson Ratio
Not Available
Not Available
Other Mechanical Properties
Unknown
NA
Magnetic Properties
Magnetic Characteristics
Specific Gravity
Not Available
13.67
15
Magnetic Ordering
Unknown
Paramagnetic
Electrical Properties
Resistivity
Not Available
0.69 nΩ·m
99+
Electrical Conductivity
Not Available
0.02 106/cm Ω
99+
Thermal Properties
Specific Heat
Not Available
0.11 J/(kg K)
99+
Molar Heat Capacity
Not Available
62.70 J/mol·K
1
Thermal Conductivity
Not Available
10.00 W/m·K
99+
Critical Temperature
Not Available
Not Available
Thermal Expansion
Not Available
Not Available
Enthalpy
Enthalpy of Fusion
Not Available
14.39 kJ/mol
24
Enthalpy of Atomization
Not Available
268.00 kJ/mol
40
Standard Molar Entropy
Not Available
Not Available
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