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Fermium Bohrium Comparison

Fermium
Bohrium
Bohrium Fermium comparison


Periodic Table
Symbol
Fm  
Bh  
Group Number
3  
15
7  
11
Period Number
7  
7  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7440724  
19
54037148  
12
Space Group Name
-  
-  
Space Group Number
194.00  
7
276.00  
1
Facts
Interesting Facts
  • Fermium metal is highly radioactive in nature.
  • Fermium is synthetically produced metal.
  
  • Bohrium metal is also known as Unnilseptium (Uns) and Nielsbohrium (Ns).
  
Sources
Bombarding Pu-239 with Neutrons  
Found in Minerals, Mining, Synthetically Produced  
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory  
Gesellschaft für Schwerionenforschung  
Discovery
In 1952  
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
-  
-  
Uses
Uses & Benefits
  • Currently known uses of Fermium metal are limited to research purpose only.
  
  • Currently known uses of Bohrium metal are limited to research purpose only.
  
Industrial Uses
-  
-  
Medical Uses
-  
-  
Other Uses
-  
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
1,527.00 °C  
26
-  
Boiling Point
0.00 °C  
99+
0.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
-  
-  
Luster
-  
Unknown Luster  
Hardness
  
  
Mohs Hardness
6.00  
6
7.00  
3
Brinell Hardness
500.00 MPa  
28
270.00 MPa  
99+
Vickers Hardness
600.00 MPa  
28
2,700.00 MPa  
4
Speed of Sound
2,500.00 m/s  
99+
2,680.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.30  
99+
1.50  
36
Reflectivity
59.00 %  
24
59.00 %  
24
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Fm  
Bh  
Isotopes
  
  
Known Isotopes
18  
21
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
627.00 kJ/mol  
99+
742.90 kJ/mol  
23
2nd Energy Level
1,225.00 kJ/mol  
99+
1,688.50 kJ/mol  
31
3rd Energy Level
2,363.00 kJ/mol  
99+
2,566.50 kJ/mol  
99+
4th Energy Level
3,792.00 kJ/mol  
99+
3,598.90 kJ/mol  
99+
5th Energy Level
6,270.00 kJ/mol  
39
4,727.80 kJ/mol  
99+
6th Energy Level
6,270.00 kJ/mol  
99+
5,991.70 kJ/mol  
99+
7th Energy level
6,270.00 kJ/mol  
99+
7,226.80 kJ/mol  
34
8th Energy Level
6,270.00 kJ/mol  
99+
7,100.00 kJ/mol  
33
9th Energy Level
7,040.00 kJ/mol  
33
5,800.00 kJ/mol  
99+
10th Energy Level
6,270.00 kJ/mol  
99+
7,100.00 kJ/mol  
35
11th Energy Level
6,270.00 kJ/mol  
99+
8,200.00 kJ/mol  
25
12th Energy Level
62,700.00 kJ/mol  
10
82,700.00 kJ/mol  
4
13th Energy Level
6,270.00 kJ/mol  
38
7,100.00 kJ/mol  
29
14th Energy Level
6,270.00 kJ/mol  
27
8,200.00 kJ/mol  
17
15th Energy Level
62,700.00 kJ/mol  
38
82,000.00 kJ/mol  
14
16th Energy Level
62,700.00 kJ/mol  
28
71,100.00 kJ/mol  
20
17th Energy Level
627.00 kJ/mol  
99+
820.00 kJ/mol  
31
18th Energy Level
6,270.00 kJ/mol  
40
8,200.00 kJ/mol  
20
19th Energy Level
994.80 kJ/mol  
21
820.80 kJ/mol  
28
20th Energy Level
627.00 kJ/mol  
99+
820.00 kJ/mol  
21
21st Energy Level
627.00 kJ/mol  
99+
8,200.00 kJ/mol  
11
22nd Energy Level
345.00 kJ/mol  
99+
820.00 kJ/mol  
16
23rd Energy Level
6,270.00 kJ/mol  
14
8,200.00 kJ/mol  
8
24th Energy Level
627.60 kJ/mol  
38
820.00 kJ/mol  
12
25th Energy Level
627.00 kJ/mol  
40
820.00 kJ/mol  
10
26th Energy Level
627.60 kJ/mol  
39
820.00 kJ/mol  
10
27th Energy Level
627.60 kJ/mol  
99+
820.00 kJ/mol  
9
28th Energy Level
627.60 kJ/mol  
99+
820.00 kJ/mol  
15
29th Energy Level
627.60 kJ/mol  
99+
820.00 kJ/mol  
14
30th Energy Level
627.60 kJ/mol  
99+
820.00 kJ/mol  
10
Electrochemical Equivalent
3.20 g/amp-hr  
15
3.00 g/amp-hr  
21
Electron Work Function
4.47 eV  
21
4.90 eV  
12
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Ionization, Radioactive Isotopes  
Atomic
Atomic Number
100  
18
107  
11
Electron Configuration
[Rn] 5f12 7s2  
[Rn] 5f14 6d5 7s2  
Crystal Structure
Not Known  
Hexagonal Close Packed (HCP)  
Crystal Lattice
Unknown-Crystal-Structure-of-Fermium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
100  
18
107  
11
Number of Neutrons
157  
8
155  
9
Number of Electrons
100  
18
107  
11
Radius of an Atom
  
  
Atomic Radius
180.00 pm  
16
128.00 pm  
99+
Covalent Radius
180.00 pm  
23
141.00 pm  
99+
Van der Waals Radius
245.00 pm  
13
0.00 pm  
99+
Atomic Weight
257.00 amu  
15
270.00 amu  
8
Atomic Volume
18.00 cm3/mol  
99+
23.70 cm3/mol  
14
Adjacent Atomic Numbers
  
  
Previous Element
Einsteinium
  
Seaborgium
  
Next Element
Mendelevium
  
Hassium
  
Valence Electron Potential
0.00 (-eV)  
99+
27.20 (-eV)  
99+
Lattice Constant
350.00 pm  
99+
-  
Lattice Angles
-  
-  
Lattice C/A Ratio
1.63  
13
1.57  
99+
Mechanical
Density
  
  
Density At Room Temperature
9.70 g/cm3  
99+
37.10 g/cm3  
3
Density When Liquid (at m.p.)
9.70 g/cm3  
99+
37.10 g/cm3  
3
Tensile Strength
0.10 MPa  
99+
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)  
30
0.00 (Pa)  
37
Elasticity properties
  
  
Shear Modulus
30.00 GPa  
27
28.00 GPa  
32
Bulk Modulus
50.00 GPa  
24
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
9.70  
99+
37.00  
5
Magnetic Ordering
-  
-  
Permeability
0.00 H/m  
16
0.00 H/m  
11
Susceptibility
0.00  
24
0.00  
24
Electrical Properties
  
  
Electrical Property
-  
-  
Resistivity
7.90 nΩ·m  
99+
6.50 nΩ·m  
99+
Electrical Conductivity
0.00 106/cm Ω  
99+
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
27.00 J/mol·K  
29
37.10 J/mol·K  
2
Thermal Conductivity
0.00 W/m·K  
99+
37.00 W/m·K  
36
Critical Temperature
1,323.00 K  
99+
1,323.00 K  
99+
Thermal Expansion
11.00 µm/(m·K)  
99+
14.30 µm/(m·K)  
28
Enthalpy
  
  
Enthalpy of Vaporization
319.20 kJ/mol  
99+
270.50 kJ/mol  
99+
Enthalpy of Fusion
13.30 kJ/mol  
30
-  
Enthalpy of Atomization
-  
-  
Standard Molar Entropy
50.00 J/mol.K  
99+
57.00 J/mol.K  
30
Summary >>
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