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Einsteinium vs Bohrium

Einsteinium
Bohrium
Bohrium vs Einsteinium


Periodic Table
Symbol
Es  
Bh  
Group Number
13  
5
7  
11
Period Number
7  
7  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7429927  
99+
54037148  
12
Space Group Name
-  
-  
Space Group Number
194.00  
7
276.00  
1
Facts
Interesting Facts
  • Einsteinium is the transuranic element found in US.
  • Only 0.01 mg of Einsteinium was synthesized in 1961.
  
  • Bohrium metal is also known as Unnilseptium (Uns) and Nielsbohrium (Ns).
  
Sources
Made by Bombarding Uranium 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
0.00 %  
24
-  
Uses
Uses & Benefits
  • Currently known uses of Einsteinium 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
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
860.00 °C  
99+
-  
Boiling Point
996.00 °C  
99+
0.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
-  
Luster
-  
Unknown Luster  
Hardness
  
  
Mohs Hardness
6.00  
6
7.00  
3
Brinell Hardness
240.00 MPa  
99+
270.00 MPa  
99+
Vickers Hardness
550.00 MPa  
31
2,700.00 MPa  
4
Speed of Sound
2,850.00 m/s  
40
2,680.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.30  
99+
1.50  
36
Reflectivity
63.00 %  
20
59.00 %  
24
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Es  
Bh  
Isotopes
  
  
Known Isotopes
16  
23
5  
32
Electronegativity
  
  
Pauling Electronegativity
1.54  
27
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
619.00 kJ/mol  
99+
742.90 kJ/mol  
23
2nd Energy Level
1,216.00 kJ/mol  
99+
1,688.50 kJ/mol  
31
3rd Energy Level
2,334.00 kJ/mol  
99+
2,566.50 kJ/mol  
99+
4th Energy Level
3,734.00 kJ/mol  
99+
3,598.90 kJ/mol  
99+
5th Energy Level
6,190.00 kJ/mol  
40
4,727.80 kJ/mol  
99+
6th Energy Level
6,190.00 kJ/mol  
99+
5,991.70 kJ/mol  
99+
7th Energy level
6,190.00 kJ/mol  
99+
7,226.80 kJ/mol  
34
8th Energy Level
6,190.00 kJ/mol  
99+
7,100.00 kJ/mol  
33
9th Energy Level
4,520.00 kJ/mol  
99+
5,800.00 kJ/mol  
99+
10th Energy Level
6,190.00 kJ/mol  
99+
7,100.00 kJ/mol  
35
11th Energy Level
6,190.00 kJ/mol  
99+
8,200.00 kJ/mol  
25
12th Energy Level
61,900.00 kJ/mol  
12
82,700.00 kJ/mol  
4
13th Energy Level
6,190.00 kJ/mol  
39
7,100.00 kJ/mol  
29
14th Energy Level
6,190.00 kJ/mol  
28
8,200.00 kJ/mol  
17
15th Energy Level
61,900.00 kJ/mol  
40
82,000.00 kJ/mol  
14
16th Energy Level
61,900.00 kJ/mol  
30
71,100.00 kJ/mol  
20
17th Energy Level
619.00 kJ/mol  
99+
820.00 kJ/mol  
31
18th Energy Level
6,190.00 kJ/mol  
99+
8,200.00 kJ/mol  
20
19th Energy Level
619.00 kJ/mol  
99+
820.80 kJ/mol  
28
20th Energy Level
619.00 kJ/mol  
99+
820.00 kJ/mol  
21
21st Energy Level
6,190.00 kJ/mol  
15
8,200.00 kJ/mol  
11
22nd Energy Level
619.00 kJ/mol  
38
820.00 kJ/mol  
16
23rd Energy Level
6,190.00 kJ/mol  
15
8,200.00 kJ/mol  
8
24th Energy Level
619.40 kJ/mol  
40
820.00 kJ/mol  
12
25th Energy Level
619.00 kJ/mol  
99+
820.00 kJ/mol  
10
26th Energy Level
619.40 kJ/mol  
40
820.00 kJ/mol  
10
27th Energy Level
619.40 kJ/mol  
99+
820.00 kJ/mol  
9
28th Energy Level
619.40 kJ/mol  
99+
820.00 kJ/mol  
15
29th Energy Level
619.40 kJ/mol  
99+
820.00 kJ/mol  
14
30th Energy Level
619.40 kJ/mol  
99+
820.00 kJ/mol  
10
Electrochemical Equivalent
4.74 g/amp-hr  
5
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
99  
19
107  
11
Electron Configuration
[Rn] 5f11 7s2  
[Rn] 5f14 6d5 7s2  
Crystal Structure
Face Centered Cubic (FCC)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
FCC-Crystal-Structure-of-Einsteinium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
99  
19
107  
11
Number of Neutrons
153  
10
155  
9
Number of Electrons
99  
19
107  
11
Radius of an Atom
  
  
Atomic Radius
186.00 pm  
11
128.00 pm  
99+
Covalent Radius
186.00 pm  
21
141.00 pm  
99+
Van der Waals Radius
0.00 pm  
99+
0.00 pm  
99+
Atomic Weight
252.00 amu  
16
270.00 amu  
8
Atomic Volume
17.04 cm3/mol  
99+
23.70 cm3/mol  
14
Adjacent Atomic Numbers
  
  
Previous Element
Californium
  
Seaborgium
  
Next Element
Fermium
  
Hassium
  
Valence Electron Potential
0.00 (-eV)  
99+
27.20 (-eV)  
99+
Lattice Constant
582.00 pm  
8
-  
Lattice Angles
-  
-  
Lattice C/A Ratio
1.29  
99+
1.57  
99+
Mechanical
Density
  
  
Density At Room Temperature
8.84 g/cm3  
99+
37.10 g/cm3  
3
Density When Liquid (at m.p.)
8.84 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)  
24
0.00 (Pa)  
37
Elasticity properties
  
  
Shear Modulus
30.00 GPa  
27
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
0.33  
11
0.35  
9
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
8.84  
99+
37.00  
5
Magnetic Ordering
Paramagnetic  
-  
Permeability
0.00 H/m  
17
0.00 H/m  
11
Susceptibility
0.00  
24
0.00  
24
Electrical Properties
  
  
Electrical Property
-  
-  
Resistivity
6.30 nΩ·m  
99+
6.50 nΩ·m  
99+
Electrical Conductivity
0.14 106/cm Ω  
15
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
27.20 J/mol·K  
24
37.10 J/mol·K  
2
Thermal Conductivity
0.00 W/m·K  
99+
37.00 W/m·K  
36
Critical Temperature
1,133.00 K  
99+
1,323.00 K  
99+
Thermal Expansion
13.50 µm/(m·K)  
33
14.30 µm/(m·K)  
28
Enthalpy
  
  
Enthalpy of Vaporization
323.80 kJ/mol  
99+
270.50 kJ/mol  
99+
Enthalpy of Fusion
14.80 kJ/mol  
24
-  
Enthalpy of Atomization
-  
-  
Standard Molar Entropy
63.00 J/mol.K  
24
57.00 J/mol.K  
30
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