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Nobelium vs Bohrium

Nobelium
Bohrium
Bohrium vs Nobelium


Periodic Table
Symbol
No  
Bh  
Group Number
3  
15
7  
11
Period Number
7  
7  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
10028145  
16
54037148  
12
Space Group Name
-  
-  
Space Group Number
194.00  
7
276.00  
1
Facts
Interesting Facts
  • The most stable isotope of Nobelium metal is No-259.
  • No-259 has a half-life of fifty-eight minutes.
  
  • Bohrium metal is also known as Unnilseptium (Uns) and Nielsbohrium (Ns).
  
Sources
Bombarding Curium-246 or Curium-249 with Carbon-12 Nuclei, Found in Minerals, Mining  
Found in Minerals, Mining, Synthetically Produced  
History
  
  
Who Discovered
Joint Institute for Nuclear Research  
Gesellschaft für Schwerionenforschung  
Discovery
In 1966  
In 1981  
Abundance
  
  
Abundance In Universe
-  
0.00 %  
37
Abundance In Sun
-  
-  
Abundance In Meteorites
-  
0.00 %  
99+
Abundance In Earth's Crust
-  
0.00 %  
99+
Abundance In Oceans
-  
-  
Abundance In Humans
-  
-  
Uses
Uses & Benefits
  • Currently known uses of Nobelium 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  
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
827.00 °C  
99+
-  
Boiling Point
2,600.00 °C  
99+
0.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
-  
-  
Luster
Unknown Luster  
Unknown Luster  
Hardness
  
  
Mohs Hardness
-  
7.00  
3
Brinell Hardness
500.00 MPa  
28
270.00 MPa  
99+
Vickers Hardness
500.00 MPa  
35
2,700.00 MPa  
4
Speed of Sound
1,100.00 m/s  
99+
2,680.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.30  
99+
1.50  
36
Reflectivity
61.00 %  
22
59.00 %  
24
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
No  
Bh  
Isotopes
  
  
Known Isotopes
13  
26
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
1.10  
99+
2.00  
6
Electropositivity
  
  
Pauling Electropositivity
2.70  
22
2.00  
99+
Ionization Energies
  
  
1st Energy Level
642.00 kJ/mol  
99+
742.90 kJ/mol  
23
2nd Energy Level
1,254.00 kJ/mol  
99+
1,688.50 kJ/mol  
31
3rd Energy Level
2,643.00 kJ/mol  
99+
2,566.50 kJ/mol  
99+
4th Energy Level
3,956.00 kJ/mol  
99+
3,598.90 kJ/mol  
99+
5th Energy Level
6,400.00 kJ/mol  
35
4,727.80 kJ/mol  
99+
6th Energy Level
6,400.00 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
6,270.00 kJ/mol  
99+
5,800.00 kJ/mol  
99+
10th Energy Level
6,270.00 kJ/mol  
99+
7,100.00 kJ/mol  
35
11th Energy Level
6,420.00 kJ/mol  
99+
8,200.00 kJ/mol  
25
12th Energy Level
64,000.00 kJ/mol  
8
82,700.00 kJ/mol  
4
13th Energy Level
6,400.00 kJ/mol  
36
7,100.00 kJ/mol  
29
14th Energy Level
6,400.00 kJ/mol  
26
8,200.00 kJ/mol  
17
15th Energy Level
64,000.00 kJ/mol  
36
82,000.00 kJ/mol  
14
16th Energy Level
64,000.00 kJ/mol  
27
71,100.00 kJ/mol  
20
17th Energy Level
641.00 kJ/mol  
99+
820.00 kJ/mol  
31
18th Energy Level
3,500.00 kJ/mol  
99+
8,200.00 kJ/mol  
20
19th Energy Level
627.60 kJ/mol  
99+
820.80 kJ/mol  
28
20th Energy Level
627.00 kJ/mol  
99+
820.00 kJ/mol  
21
21st Energy Level
917.00 kJ/mol  
34
8,200.00 kJ/mol  
11
22nd Energy Level
627.00 kJ/mol  
36
820.00 kJ/mol  
16
23rd Energy Level
6,410.00 kJ/mol  
12
8,200.00 kJ/mol  
8
24th Energy Level
627.00 kJ/mol  
39
820.00 kJ/mol  
12
25th Energy Level
0.00 kJ/mol  
99+
820.00 kJ/mol  
10
26th Energy Level
601.20 kJ/mol  
99+
820.00 kJ/mol  
10
27th Energy Level
641.00 kJ/mol  
37
820.00 kJ/mol  
9
28th Energy Level
641.60 kJ/mol  
99+
820.00 kJ/mol  
15
29th Energy Level
641.00 kJ/mol  
99+
820.00 kJ/mol  
14
30th Energy Level
627.00 kJ/mol  
99+
820.00 kJ/mol  
10
Electrochemical Equivalent
4.83 g/amp-hr  
4
3.00 g/amp-hr  
21
Electron Work Function
4.90 eV  
12
4.90 eV  
12
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Ionization, Radioactive Isotopes  
Atomic
Atomic Number
102  
16
107  
11
Electron Configuration
[Rn] 5f14 7s2  
[Rn] 5f14 6d5 7s2  
Crystal Structure
Not Known  
Hexagonal Close Packed (HCP)  
Crystal Lattice
Unknown-Crystal-Structure-of-Nobelium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
102  
16
107  
11
Number of Neutrons
157  
8
155  
9
Number of Electrons
102  
16
107  
11
Radius of an Atom
  
  
Atomic Radius
176.00 pm  
20
128.00 pm  
99+
Covalent Radius
157.00 pm  
33
141.00 pm  
99+
Van der Waals Radius
246.00 pm  
12
0.00 pm  
99+
Atomic Weight
259.00 amu  
13
270.00 amu  
8
Atomic Volume
19.80 cm3/mol  
33
23.70 cm3/mol  
14
Adjacent Atomic Numbers
  
  
Previous Element
Mendelevium
  
Seaborgium
  
Next Element
Lawrencium
  
Hassium
  
Valence Electron Potential
26.00 (-eV)  
99+
27.20 (-eV)  
99+
Lattice Constant
-  
-  
Lattice Angles
-  
-  
Lattice C/A Ratio
1.76  
5
1.57  
99+
Mechanical
Density
  
  
Density At Room Temperature
9.90 g/cm3  
99+
37.10 g/cm3  
3
Density When Liquid (at m.p.)
9.90 g/cm3  
99+
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)  
37
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
28
0.00 (Pa)  
37
Elasticity properties
  
  
Shear Modulus
27.00 GPa  
34
28.00 GPa  
32
Bulk Modulus
8.70 GPa  
99+
37.00 GPa  
99+
Young's Modulus
12.30 GPa  
99+
0.00 GPa  
99+
Poisson Ratio
0.30  
14
0.35  
9
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
9.90  
99+
37.00  
5
Magnetic Ordering
-  
-  
Permeability
0.00 H/m  
3
0.00 H/m  
11
Susceptibility
0.00  
24
0.00  
24
Electrical Properties
  
  
Electrical Property
-  
-  
Resistivity
0.68 nΩ·m  
99+
6.50 nΩ·m  
99+
Electrical Conductivity
0.00 106/cm Ω  
99+
0.00 106/cm Ω  
99+
Electron Affinity
50.00 kJ/mol  
26
-  
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
0.10 W/m·K  
99+
37.00 W/m·K  
36
Critical Temperature
1,100.00 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
-  
270.50 kJ/mol  
99+
Enthalpy of Fusion
-  
-  
Enthalpy of Atomization
390.40 kJ/mol  
30
-  
Standard Molar Entropy
63.00 J/mol.K  
24
57.00 J/mol.K  
30
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