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Curium Bohrium Comparison

Curium
Bohrium
Bohrium Curium comparison


Periodic Table
Symbol
Cm  
Bh  
Group Number
3  
15
7  
11
Period Number
7  
7  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7440519  
36
54037148  
12
Space Group Name
-  
-  
Space Group Number
225.00  
3
276.00  
1
Facts
Interesting Facts
  • Curium metal does not occur free in nature.
  • Curium metal is a synthetically produced metal.
  
  • Bohrium metal is also known as Unnilseptium (Uns) and Nielsbohrium (Ns).
  
Sources
Bombarding Plutonium with Helium Ions  
Found in Minerals, Mining, Synthetically Produced  
History
  
  
Who Discovered
Glenn T. Seaborg, Ralph A. James, 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
  • Curium metal is used to provide power to electrical equipment for space missions.
  
  • Currently known uses of Bohrium metal are limited to research purpose only.
  
Industrial Uses
-  
-  
Medical Uses
-  
-  
Other Uses
Research Purposes  
Research Purposes  
Biological Properties
  
  
Toxicity
-  
-  
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
1,340.00 °C  
34
-  
Boiling Point
3,110.00 °C  
31
0.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
-  
Luster
Metallic  
Unknown Luster  
Hardness
  
  
Mohs Hardness
2.00  
17
7.00  
3
Brinell Hardness
320.00 MPa  
40
270.00 MPa  
99+
Vickers Hardness
461.00 MPa  
37
2,700.00 MPa  
4
Speed of Sound
2,260.00 m/s  
99+
2,680.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.30  
99+
1.50  
36
Reflectivity
60.00 %  
23
59.00 %  
24
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Cm  
Bh  
Isotopes
  
  
Known Isotopes
15  
24
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
581.00 kJ/mol  
99+
742.90 kJ/mol  
23
2nd Energy Level
1,196.00 kJ/mol  
99+
1,688.50 kJ/mol  
31
3rd Energy Level
2,026.00 kJ/mol  
99+
2,566.50 kJ/mol  
99+
4th Energy Level
3,550.00 kJ/mol  
99+
3,598.90 kJ/mol  
99+
5th Energy Level
5,810.00 kJ/mol  
99+
4,727.80 kJ/mol  
99+
6th Energy Level
5,810.00 kJ/mol  
99+
5,991.70 kJ/mol  
99+
7th Energy level
5,810.00 kJ/mol  
99+
7,226.80 kJ/mol  
34
8th Energy Level
5,810.00 kJ/mol  
99+
7,100.00 kJ/mol  
33
9th Energy Level
6,690.00 kJ/mol  
37
5,800.00 kJ/mol  
99+
10th Energy Level
5,810.00 kJ/mol  
99+
7,100.00 kJ/mol  
35
11th Energy Level
5,810.00 kJ/mol  
99+
8,200.00 kJ/mol  
25
12th Energy Level
58,100.00 kJ/mol  
19
82,700.00 kJ/mol  
4
13th Energy Level
5,810.00 kJ/mol  
99+
7,100.00 kJ/mol  
29
14th Energy Level
5,810.00 kJ/mol  
40
8,200.00 kJ/mol  
17
15th Energy Level
58,100.00 kJ/mol  
99+
82,000.00 kJ/mol  
14
16th Energy Level
58,100.00 kJ/mol  
99+
71,100.00 kJ/mol  
20
17th Energy Level
581.00 kJ/mol  
99+
820.00 kJ/mol  
31
18th Energy Level
5,810.00 kJ/mol  
99+
8,200.00 kJ/mol  
20
19th Energy Level
581.00 kJ/mol  
99+
820.80 kJ/mol  
28
20th Energy Level
581.00 kJ/mol  
99+
820.00 kJ/mol  
21
21st Energy Level
5,810.00 kJ/mol  
20
8,200.00 kJ/mol  
11
22nd Energy Level
581.00 kJ/mol  
99+
820.00 kJ/mol  
16
23rd Energy Level
5,810.00 kJ/mol  
20
8,200.00 kJ/mol  
8
24th Energy Level
581.00 kJ/mol  
99+
820.00 kJ/mol  
12
25th Energy Level
581.00 kJ/mol  
99+
820.00 kJ/mol  
10
26th Energy Level
581.00 kJ/mol  
99+
820.00 kJ/mol  
10
27th Energy Level
581.00 kJ/mol  
99+
820.00 kJ/mol  
9
28th Energy Level
581.00 kJ/mol  
99+
820.00 kJ/mol  
15
29th Energy Level
581.00 kJ/mol  
99+
820.00 kJ/mol  
14
30th Energy Level
581.00 kJ/mol  
99+
820.00 kJ/mol  
10
Electrochemical Equivalent
3.07 g/amp-hr  
19
3.00 g/amp-hr  
21
Electron Work Function
4.50 eV  
19
4.90 eV  
12
Other Chemical Properties
Ionization, Radioactive Isotopes  
Ionization, Radioactive Isotopes  
Atomic
Atomic Number
96  
22
107  
11
Electron Configuration
[Rn] 5f7 6d1 7s2  
[Rn] 5f14 6d5 7s2  
Crystal Structure
Double Hexagonal Close Packed (DHCP)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
DHCP-Crystal-Structure-of-Curium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
96  
22
107  
11
Number of Neutrons
151  
11
155  
9
Number of Electrons
96  
22
107  
11
Radius of an Atom
  
  
Atomic Radius
174.00 pm  
22
128.00 pm  
99+
Covalent Radius
169.00 pm  
28
141.00 pm  
99+
Van der Waals Radius
200.00 pm  
35
0.00 pm  
99+
Atomic Weight
247.00 amu  
18
270.00 amu  
8
Atomic Volume
18.28 cm3/mol  
38
23.70 cm3/mol  
14
Adjacent Atomic Numbers
  
  
Previous Element
Americium
  
Seaborgium
  
Next Element
Berkelium
  
Hassium
  
Valence Electron Potential
44.50 (-eV)  
39
27.20 (-eV)  
99+
Lattice Constant
336.25 pm  
99+
-  
Lattice Angles
-  
-  
Lattice C/A Ratio
1.67  
11
1.57  
99+
Mechanical
Density
  
  
Density At Room Temperature
13.51 g/cm3  
26
37.10 g/cm3  
3
Density When Liquid (at m.p.)
13.85 g/cm3  
25
37.10 g/cm3  
3
Tensile Strength
350.00 MPa  
12
152.00 MPa  
24
Viscosity
0.00  
25
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
22
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
24
0.00 (Pa)  
37
Elasticity properties
  
  
Shear Modulus
32.00 GPa  
24
28.00 GPa  
32
Bulk Modulus
40.00 GPa  
38
37.00 GPa  
99+
Young's Modulus
0.00 GPa  
99+
0.00 GPa  
99+
Poisson Ratio
0.35  
9
0.35  
9
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
13.51  
28
37.00  
5
Magnetic Ordering
Antiferromagnetic  
-  
Permeability
0.00 H/m  
17
0.00 H/m  
11
Susceptibility
0.00  
24
0.00  
24
Electrical Properties
  
  
Electrical Property
-  
-  
Resistivity
1.25 nΩ·m  
99+
6.50 nΩ·m  
99+
Electrical Conductivity
0.13 106/cm Ω  
19
0.00 106/cm Ω  
99+
Electron Affinity
0.00 kJ/mol  
99+
-  
Thermal
Specific Heat
0.10 J/(kg K)  
99+
0.10 J/(kg K)  
99+
Molar Heat Capacity
27.50 J/mol·K  
21
37.10 J/mol·K  
2
Thermal Conductivity
11.00 W/m·K  
99+
37.00 W/m·K  
36
Critical Temperature
1,340.00 K  
99+
1,323.00 K  
99+
Thermal Expansion
11.60 µm/(m·K)  
99+
14.30 µm/(m·K)  
28
Enthalpy
  
  
Enthalpy of Vaporization
331.60 kJ/mol  
40
270.50 kJ/mol  
99+
Enthalpy of Fusion
15.00 kJ/mol  
22
-  
Enthalpy of Atomization
-  
-  
Standard Molar Entropy
52.50 J/mol.K  
36
57.00 J/mol.K  
30
Summary >>
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