Home
 Compare Metals

Americium Bohrium Comparison

Americium
Bohrium
Bohrium Americium comparison


Periodic Table
Symbol
Am  
Bh  
Group Number
10  
8
7  
11
Period Number
7  
7  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7440359  
99+
54037148  
12
Space Group Name
P63/mmc  
-  
Space Group Number
194.00  
7
276.00  
1
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).
  
  • Bohrium metal is also known as Unnilseptium (Uns) and Nielsbohrium (Ns).
  
Sources
Obtained By Bombarding Plutonium with Neutrons  
Found in Minerals, Mining, Synthetically Produced  
History
  
  
Who Discovered
Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso  
Gesellschaft für Schwerionenforschung  
Discovery
In 1944  
In 1981  
Abundance
  
  
Abundance In Universe
0.00 %  
35
0.00 %  
37
Abundance In Sun
0.00 %  
30
-  
Abundance In Meteorites
0.00 %  
99+
0.00 %  
99+
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
99+
Abundance In Oceans
-  
-  
Abundance In Humans
0.00 %  
24
-  
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.
  
  • Currently known uses of Bohrium metal are limited to research purpose only.
  
Industrial Uses
-  
-  
Medical Uses
-  
-  
Other Uses
Alloys, Nuclear Research, Research Purposes  
Research Purposes  
Biological Properties
  
  
Toxicity
Toxic  
-  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
40
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
994.00 °C  
99+
-  
Boiling Point
2,607.00 °C  
99+
0.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
-  
Luster
-  
Unknown Luster  
Hardness
  
  
Mohs Hardness
6.00  
6
7.00  
3
Brinell Hardness
260.00 MPa  
99+
270.00 MPa  
99+
Vickers Hardness
600.00 MPa  
28
2,700.00 MPa  
4
Speed of Sound
2,750.00 m/s  
99+
2,680.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.30  
99+
1.50  
36
Reflectivity
64.00 %  
19
59.00 %  
24
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Am  
Bh  
Isotopes
  
  
Known Isotopes
16  
23
5  
32
Electronegativity
  
  
Pauling Electronegativity
1.30  
33
2.00  
8
Sanderson Electronegativity
1.30  
25
1.30  
25
Allred Rochow Electronegativity
1.20  
28
1.30  
25
Mulliken-Jaffe Electronegativity
1.30  
33
1.30  
33
Allen Electronegativity
1.30  
40
2.00  
6
Electropositivity
  
  
Pauling Electropositivity
2.70  
22
2.00  
99+
Ionization Energies
  
  
1st Energy Level
578.00 kJ/mol  
99+
742.90 kJ/mol  
23
2nd Energy Level
1,158.00 kJ/mol  
99+
1,688.50 kJ/mol  
31
3rd Energy Level
2,132.00 kJ/mol  
99+
2,566.50 kJ/mol  
99+
4th Energy Level
3,493.00 kJ/mol  
99+
3,598.90 kJ/mol  
99+
5th Energy Level
5,780.00 kJ/mol  
99+
4,727.80 kJ/mol  
99+
6th Energy Level
5,780.00 kJ/mol  
99+
5,991.70 kJ/mol  
99+
7th Energy level
5,780.00 kJ/mol  
99+
7,226.80 kJ/mol  
34
8th Energy Level
5,780.00 kJ/mol  
99+
7,100.00 kJ/mol  
33
9th Energy Level
5,780.00 kJ/mol  
99+
5,800.00 kJ/mol  
99+
10th Energy Level
5,780.00 kJ/mol  
99+
7,100.00 kJ/mol  
35
11th Energy Level
5,780.00 kJ/mol  
99+
8,200.00 kJ/mol  
25
12th Energy Level
62,400.00 kJ/mol  
11
82,700.00 kJ/mol  
4
13th Energy Level
5,780.00 kJ/mol  
99+
7,100.00 kJ/mol  
29
14th Energy Level
5,780.00 kJ/mol  
99+
8,200.00 kJ/mol  
17
15th Energy Level
62,400.00 kJ/mol  
39
82,000.00 kJ/mol  
14
16th Energy Level
57,800.00 kJ/mol  
99+
71,100.00 kJ/mol  
20
17th Energy Level
578.00 kJ/mol  
99+
820.00 kJ/mol  
31
18th Energy Level
5,780.00 kJ/mol  
99+
8,200.00 kJ/mol  
20
19th Energy Level
578.00 kJ/mol  
99+
820.80 kJ/mol  
28
20th Energy Level
578.00 kJ/mol  
99+
820.00 kJ/mol  
21
21st Energy Level
5,780.00 kJ/mol  
22
8,200.00 kJ/mol  
11
22nd Energy Level
578.00 kJ/mol  
99+
820.00 kJ/mol  
16
23rd Energy Level
5,780.00 kJ/mol  
23
8,200.00 kJ/mol  
8
24th Energy Level
578.00 kJ/mol  
99+
820.00 kJ/mol  
12
25th Energy Level
578.00 kJ/mol  
99+
820.00 kJ/mol  
10
26th Energy Level
578.00 kJ/mol  
99+
820.00 kJ/mol  
10
27th Energy Level
578.00 kJ/mol  
99+
820.00 kJ/mol  
9
28th Energy Level
578.00 kJ/mol  
99+
820.00 kJ/mol  
15
29th Energy Level
578.00 kJ/mol  
99+
820.00 kJ/mol  
14
30th Energy Level
578.00 kJ/mol  
99+
820.00 kJ/mol  
10
Electrochemical Equivalent
3.02 g/amp-hr  
20
3.00 g/amp-hr  
21
Electron Work Function
4.30 eV  
25
4.90 eV  
12
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Ionization, Radioactive Isotopes  
Atomic
Atomic Number
95  
23
107  
11
Electron Configuration
[Rn] 5f7 7s2  
[Rn] 5f14 6d5 7s2  
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
107  
11
Number of Neutrons
148  
13
155  
9
Number of Electrons
95  
23
107  
11
Radius of an Atom
  
  
Atomic Radius
173.00 pm  
23
128.00 pm  
99+
Covalent Radius
180.00 pm  
23
141.00 pm  
99+
Van der Waals Radius
244.00 pm  
14
0.00 pm  
99+
Atomic Weight
243.00 amu  
20
270.00 amu  
8
Atomic Volume
17.86 cm3/mol  
99+
23.70 cm3/mol  
14
Adjacent Atomic Numbers
  
  
Previous Element
Plutonium
  
Seaborgium
  
Next Element
Curium
  
Hassium
  
Valence Electron Potential
44.00 (-eV)  
99+
27.20 (-eV)  
99+
Lattice Constant
346.81 pm  
99+
-  
Lattice Angles
π/2, π/2, 2 π/3  
-  
Lattice C/A Ratio
1.58  
34
1.57  
99+
Mechanical
Density
  
  
Density At Room Temperature
12.00 g/cm3  
32
37.10 g/cm3  
3
Density When Liquid (at m.p.)
13.67 g/cm3  
26
37.10 g/cm3  
3
Tensile Strength
80.00 MPa  
29
152.00 MPa  
24
Viscosity
0.00  
25
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
13
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
24
0.00 (Pa)  
37
Elasticity properties
  
  
Shear Modulus
26.00 GPa  
36
28.00 GPa  
32
Bulk Modulus
44.00 GPa  
32
37.00 GPa  
99+
Young's Modulus
58.00 GPa  
36
0.00 GPa  
99+
Poisson Ratio
0.30  
14
0.35  
9
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
13.67  
26
37.00  
5
Magnetic Ordering
Paramagnetic  
-  
Permeability
0.00 H/m  
16
0.00 H/m  
11
Susceptibility
0.00  
24
0.00  
24
Electrical Properties
  
  
Electrical Property
-  
-  
Resistivity
0.69 nΩ·m  
99+
6.50 nΩ·m  
99+
Electrical Conductivity
0.02 106/cm Ω  
99+
0.00 106/cm Ω  
99+
Electron Affinity
63.90 kJ/mol  
18
-  
Thermal
Specific Heat
0.11 J/(kg K)  
99+
0.10 J/(kg K)  
99+
Molar Heat Capacity
62.70 J/mol·K  
1
37.10 J/mol·K  
2
Thermal Conductivity
10.00 W/m·K  
99+
37.00 W/m·K  
36
Critical Temperature
1,449.00 K  
99+
1,323.00 K  
99+
Thermal Expansion
13.60 µm/(m·K)  
32
14.30 µm/(m·K)  
28
Enthalpy
  
  
Enthalpy of Vaporization
161.00 kJ/mol  
99+
270.50 kJ/mol  
99+
Enthalpy of Fusion
14.39 kJ/mol  
27
-  
Enthalpy of Atomization
268.00 kJ/mol  
99+
-  
Standard Molar Entropy
63.10 J/mol.K  
23
57.00 J/mol.K  
30
Summary >>
<< Thermal

Compare Actinide Series

Actinide Series

Actinide Series

» More Actinide Series

Compare Actinide Series

» More Compare Actinide Series
Home | About | Contact | Disclaimer | Terms of use
© A softusvista inc. venture!