Home
 Compare Metals

Bohrium Mendelevium Comparison

Bohrium
Mendelevium
Mendelevium Bohrium comparison


Periodic Table
Symbol
Bh  
Md  
Group Number
7  
11
3  
15
Period Number
7  
7  
Block
d block  
f block  
Element Family
Transition Metal  
Actinide  
CAS Number
54037148  
12
7440111  
99+
Space Group Name
-  
-  
Space Group Number
276.00  
1
194.00  
7
Facts
Interesting Facts
  • Bohrium metal is also known as Unnilseptium (Uns) and Nielsbohrium (Ns).
  
  • Mendelevium metal is synthetically produced metal.
  • Mendelevium metal has been produced in only trace amount.
  
Sources
Found in Minerals, Mining, Synthetically Produced  
Bombarding Einsteinium with Helium Ions  
History
  
  
Who Discovered
Gesellschaft für Schwerionenforschung  
Lawrence Berkeley National Laboratory  
Discovery
In 1981  
In 1955  
Abundance
  
  
Abundance In Universe
0.00 %  
37
0.00 %  
40
Abundance In Sun
-  
-  
Abundance In Meteorites
0.00 %  
99+
0.00 %  
99+
Abundance In Earth's Crust
0.00 %  
99+
-  
Abundance In Oceans
-  
-  
Abundance In Humans
-  
0.00 %  
24
Uses
Uses & Benefits
  • Currently known uses of Bohrium metal are limited to research purpose only.
  
  • Currently known uses of Mendelevium 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
-  
827.00 °C  
99+
Boiling Point
0.00 °C  
99+
0.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
-  
-  
Luster
Unknown Luster  
Metallic  
Hardness
  
  
Mohs Hardness
7.00  
3
-  
Brinell Hardness
270.00 MPa  
99+
350.00 MPa  
36
Vickers Hardness
2,700.00 MPa  
4
0.00 MPa  
99+
Speed of Sound
2,680.00 m/s  
99+
2,680.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.50  
36
1.30  
99+
Reflectivity
59.00 %  
24
66.00 %  
17
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Bh  
Md  
Isotopes
  
  
Known Isotopes
5  
32
16  
23
Electronegativity
  
  
Pauling Electronegativity
2.00  
8
1.30  
33
Sanderson Electronegativity
1.30  
25
1.30  
25
Allred Rochow Electronegativity
1.30  
25
1.20  
28
Mulliken-Jaffe Electronegativity
1.30  
33
1.30  
33
Allen Electronegativity
2.00  
6
1.30  
40
Electropositivity
  
  
Pauling Electropositivity
2.00  
99+
2.70  
22
Ionization Energies
  
  
1st Energy Level
742.90 kJ/mol  
23
635.00 kJ/mol  
99+
2nd Energy Level
1,688.50 kJ/mol  
31
1,235.00 kJ/mol  
99+
3rd Energy Level
2,566.50 kJ/mol  
99+
2,470.00 kJ/mol  
99+
4th Energy Level
3,598.90 kJ/mol  
99+
3,840.00 kJ/mol  
99+
5th Energy Level
4,727.80 kJ/mol  
99+
6,350.00 kJ/mol  
36
6th Energy Level
5,991.70 kJ/mol  
99+
6,350.00 kJ/mol  
99+
7th Energy level
7,226.80 kJ/mol  
34
6,350.00 kJ/mol  
99+
8th Energy Level
7,100.00 kJ/mol  
33
6,350.00 kJ/mol  
99+
9th Energy Level
5,800.00 kJ/mol  
99+
6,350.00 kJ/mol  
99+
10th Energy Level
7,100.00 kJ/mol  
35
6,350.00 kJ/mol  
99+
11th Energy Level
8,200.00 kJ/mol  
25
6,400.00 kJ/mol  
99+
12th Energy Level
82,700.00 kJ/mol  
4
60,100.00 kJ/mol  
16
13th Energy Level
7,100.00 kJ/mol  
29
6,350.00 kJ/mol  
37
14th Energy Level
8,200.00 kJ/mol  
17
1,150.00 kJ/mol  
99+
15th Energy Level
82,000.00 kJ/mol  
14
63,500.00 kJ/mol  
37
16th Energy Level
71,100.00 kJ/mol  
20
635.00 kJ/mol  
99+
17th Energy Level
820.00 kJ/mol  
31
1,107.00 kJ/mol  
21
18th Energy Level
8,200.00 kJ/mol  
20
6,350.00 kJ/mol  
39
19th Energy Level
820.80 kJ/mol  
28
635.00 kJ/mol  
99+
20th Energy Level
820.00 kJ/mol  
21
635.00 kJ/mol  
40
21st Energy Level
8,200.00 kJ/mol  
11
6,350.00 kJ/mol  
13
22nd Energy Level
820.00 kJ/mol  
16
635.00 kJ/mol  
34
23rd Energy Level
8,200.00 kJ/mol  
8
6,350.00 kJ/mol  
13
24th Energy Level
820.00 kJ/mol  
12
635.00 kJ/mol  
36
25th Energy Level
820.00 kJ/mol  
10
635.00 kJ/mol  
38
26th Energy Level
820.00 kJ/mol  
10
635.00 kJ/mol  
37
27th Energy Level
820.00 kJ/mol  
9
635.00 kJ/mol  
39
28th Energy Level
820.00 kJ/mol  
15
635.00 kJ/mol  
99+
29th Energy Level
820.00 kJ/mol  
14
635.00 kJ/mol  
99+
30th Energy Level
820.00 kJ/mol  
10
635.00 kJ/mol  
40
Electrochemical Equivalent
3.00 g/amp-hr  
21
3.21 g/amp-hr  
13
Electron Work Function
4.90 eV  
12
3.89 eV  
37
Other Chemical Properties
Ionization, Radioactive Isotopes  
Ionization, Radioactive Isotopes, Radioactivity  
Atomic
Atomic Number
107  
11
101  
17
Electron Configuration
[Rn] 5f14 6d5 7s2  
[Rn] 5f13 7s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Not Known  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
Unknown-Crystal-Structure-of-Mendelevium.jpg#100  
Atom
  
  
Number of Protons
107  
11
101  
17
Number of Neutrons
155  
9
157  
8
Number of Electrons
107  
11
101  
17
Radius of an Atom
  
  
Atomic Radius
128.00 pm  
99+
175.00 pm  
21
Covalent Radius
141.00 pm  
99+
175.00 pm  
25
Van der Waals Radius
0.00 pm  
99+
246.00 pm  
12
Atomic Weight
270.00 amu  
8
258.00 amu  
14
Atomic Volume
23.70 cm3/mol  
14
19.90 cm3/mol  
32
Adjacent Atomic Numbers
  
  
Previous Element
Seaborgium
  
Fermium
  
Next Element
Hassium
  
Nobelium
  
Valence Electron Potential
27.20 (-eV)  
99+
63.70 (-eV)  
23
Lattice Constant
-  
-  
Lattice Angles
-  
-  
Lattice C/A Ratio
1.57  
99+
1.58  
36
Mechanical
Density
  
  
Density At Room Temperature
37.10 g/cm3  
3
10.30 g/cm3  
38
Density When Liquid (at m.p.)
37.10 g/cm3  
3
10.30 g/cm3  
39
Tensile Strength
152.00 MPa  
24
80.00 MPa  
29
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)  
37
0.00 (Pa)  
37
Elasticity properties
  
  
Shear Modulus
28.00 GPa  
32
32.00 GPa  
24
Bulk Modulus
37.00 GPa  
99+
0.00 GPa  
99+
Young's Modulus
0.00 GPa  
99+
12.00 GPa  
99+
Poisson Ratio
0.35  
9
0.30  
14
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
37.00  
5
13.50  
29
Magnetic Ordering
-  
-  
Permeability
0.00 H/m  
11
0.00 H/m  
11
Susceptibility
0.00  
24
0.00  
24
Electrical Properties
  
  
Electrical Property
-  
-  
Resistivity
6.50 nΩ·m  
99+
0.63 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
37.10 J/mol·K  
2
27.00 J/mol·K  
29
Thermal Conductivity
37.00 W/m·K  
36
0.00 W/m·K  
99+
Critical Temperature
1,323.00 K  
99+
1,100.00 K  
99+
Thermal Expansion
14.30 µm/(m·K)  
28
11.60 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
270.50 kJ/mol  
99+
380.50 kJ/mol  
26
Enthalpy of Fusion
-  
-  
Enthalpy of Atomization
-  
410.80 kJ/mol  
25
Standard Molar Entropy
57.00 J/mol.K  
30
37.40 J/mol.K  
99+
Summary >>
<< Thermal

Compare Transition Metals

Transition Metals

Transition Metals

» More Transition Metals

Compare Transition Metals

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