Home
 Compare Metals

Einsteinium vs Roentgenium

Einsteinium
Roentgenium
Roentgenium vs Einsteinium


Periodic Table
Symbol
Es  
Rg  
Group Number
13  
5
11  
7
Period Number
7  
7  
Block
f block  
d block  
Element Family
Actinide  
-  
CAS Number
7429927  
99+
54386242  
1
Space Group Name
-  
-  
Space Group Number
194.00  
7
194.00  
7
Facts
Interesting Facts
  • Einsteinium is the transuranic element found in US.
  • Only 0.01 mg of Einsteinium was synthesized in 1961.
  
Roentgenium is a highly unstable synthetic element.  
Sources
Made by Bombarding Uranium with Neutrons  
Synthetically Produced  
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory  
Gesellschaft für Schwerionenforschung  
Discovery
In 1952  
In 1994  
Abundance
  
  
Abundance In Universe
0.00 %  
35
0.00 %  
40
Abundance In Sun
0.00 %  
30
-  
Abundance In Meteorites
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 Einsteinium metal are limited to research purpose only.
  
  • Currently known uses of Roentgenium 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+
2,800.00 °C  
38
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Silver  
Luster
-  
Unknown Luster  
Hardness
  
  
Mohs Hardness
6.00  
6
-  
Brinell Hardness
240.00 MPa  
99+
700.00 MPa  
17
Vickers Hardness
550.00 MPa  
31
450.00 MPa  
38
Speed of Sound
2,850.00 m/s  
40
3,430.00 m/s  
32
Optical Properties
  
  
Refractive Index
1.30  
99+
1.30  
99+
Reflectivity
63.00 %  
20
64.00 %  
19
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Es  
Rg  
Isotopes
  
  
Known Isotopes
16  
23
1  
34
Electronegativity
  
  
Pauling Electronegativity
1.54  
27
0.00  
99+
Sanderson Electronegativity
1.30  
25
1.90  
13
Allred Rochow Electronegativity
1.20  
28
1.30  
25
Mulliken-Jaffe Electronegativity
1.30  
33
0.90  
99+
Allen Electronegativity
1.30  
40
0.80  
99+
Electropositivity
  
  
Pauling Electropositivity
2.70  
22
2.20  
39
Ionization Energies
  
  
1st Energy Level
619.00 kJ/mol  
99+
1,022.70 kJ/mol  
3
2nd Energy Level
1,216.00 kJ/mol  
99+
2,074.40 kJ/mol  
10
3rd Energy Level
2,334.00 kJ/mol  
99+
3,077.90 kJ/mol  
24
4th Energy Level
3,734.00 kJ/mol  
99+
4,052.40 kJ/mol  
99+
5th Energy Level
6,190.00 kJ/mol  
40
5,306.70 kJ/mol  
99+
6th Energy Level
6,190.00 kJ/mol  
99+
11,100.00 kJ/mol  
10
7th Energy level
6,190.00 kJ/mol  
99+
5,800.00 kJ/mol  
99+
8th Energy Level
6,190.00 kJ/mol  
99+
5,800.00 kJ/mol  
99+
9th Energy Level
4,520.00 kJ/mol  
99+
5,650.00 kJ/mol  
99+
10th Energy Level
6,190.00 kJ/mol  
99+
5,800.00 kJ/mol  
99+
11th Energy Level
6,190.00 kJ/mol  
99+
8,300.00 kJ/mol  
24
12th Energy Level
61,900.00 kJ/mol  
12
8,300.00 kJ/mol  
99+
13th Energy Level
6,190.00 kJ/mol  
39
8,700.00 kJ/mol  
16
14th Energy Level
6,190.00 kJ/mol  
28
8,300.00 kJ/mol  
16
15th Energy Level
61,900.00 kJ/mol  
40
87,000.00 kJ/mol  
9
16th Energy Level
61,900.00 kJ/mol  
30
83,000.00 kJ/mol  
11
17th Energy Level
619.00 kJ/mol  
99+
830.80 kJ/mol  
30
18th Energy Level
6,190.00 kJ/mol  
99+
8,300.00 kJ/mol  
19
19th Energy Level
619.00 kJ/mol  
99+
580.00 kJ/mol  
99+
20th Energy Level
619.00 kJ/mol  
99+
580.00 kJ/mol  
99+
21st Energy Level
6,190.00 kJ/mol  
15
5,800.00 kJ/mol  
21
22nd Energy Level
619.00 kJ/mol  
38
580.00 kJ/mol  
99+
23rd Energy Level
6,190.00 kJ/mol  
15
5,800.00 kJ/mol  
21
24th Energy Level
619.40 kJ/mol  
40
538.70 kJ/mol  
99+
25th Energy Level
619.00 kJ/mol  
99+
0.00 kJ/mol  
99+
26th Energy Level
619.40 kJ/mol  
40
580.00 kJ/mol  
99+
27th Energy Level
619.40 kJ/mol  
99+
580.00 kJ/mol  
99+
28th Energy Level
619.40 kJ/mol  
99+
880.00 kJ/mol  
8
29th Energy Level
619.40 kJ/mol  
99+
580.00 kJ/mol  
99+
30th Energy Level
619.40 kJ/mol  
99+
0.00 kJ/mol  
99+
Electrochemical Equivalent
4.74 g/amp-hr  
5
3.10 g/amp-hr  
18
Electron Work Function
4.90 eV  
12
4.90 eV  
12
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
-  
Atomic
Atomic Number
99  
19
111  
7
Electron Configuration
[Rn] 5f11 7s2  
[Rn] 5f14 6d9 7s2  
Crystal Structure
Face Centered Cubic (FCC)  
Body Centered Cubic (BCC)  
Crystal Lattice
FCC-Crystal-Structure-of-Einsteinium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
99  
19
111  
7
Number of Neutrons
153  
10
161  
4
Number of Electrons
99  
19
111  
7
Radius of an Atom
  
  
Atomic Radius
186.00 pm  
11
200.00 pm  
7
Covalent Radius
186.00 pm  
21
126.00 pm  
99+
Van der Waals Radius
0.00 pm  
99+
280.00 pm  
6
Atomic Weight
252.00 amu  
16
281.00 amu  
6
Atomic Volume
17.04 cm3/mol  
99+
28.70 cm3/mol  
12
Adjacent Atomic Numbers
  
  
Previous Element
Californium
  
Darmstadtium
  
Next Element
Fermium
  
Copernicium
  
Valence Electron Potential
0.00 (-eV)  
99+
11.90 (-eV)  
99+
Lattice Constant
582.00 pm  
8
0.00 pm  
99+
Lattice Angles
-  
-  
Lattice C/A Ratio
1.29  
99+
1.90  
1
Mechanical
Density
  
  
Density At Room Temperature
8.84 g/cm3  
99+
28.70 g/cm3  
6
Density When Liquid (at m.p.)
8.84 g/cm3  
99+
28.70 g/cm3  
7
Tensile Strength
0.10 MPa  
99+
65.00 MPa  
33
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)  
99+
Elasticity properties
  
  
Shear Modulus
30.00 GPa  
27
26.00 GPa  
36
Bulk Modulus
40.00 GPa  
38
0.00 GPa  
99+
Young's Modulus
0.00 GPa  
99+
12.70 GPa  
99+
Poisson Ratio
0.33  
11
0.30  
14
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
8.84  
99+
28.70  
8
Magnetic Ordering
Paramagnetic  
-  
Permeability
0.00 H/m  
17
0.00 H/m  
12
Susceptibility
0.00  
24
0.00  
24
Electrical Properties
  
  
Electrical Property
-  
-  
Resistivity
6.30 nΩ·m  
99+
0.20 nΩ·m  
99+
Electrical Conductivity
0.14 106/cm Ω  
15
0.00 106/cm Ω  
99+
Electron Affinity
0.00 kJ/mol  
99+
50.00 kJ/mol  
26
Thermal
Specific Heat
0.10 J/(kg K)  
99+
0.13 J/(kg K)  
40
Molar Heat Capacity
27.20 J/mol·K  
24
23.70 J/mol·K  
99+
Thermal Conductivity
0.00 W/m·K  
99+
0.10 W/m·K  
99+
Critical Temperature
1,133.00 K  
99+
1,100.00 K  
99+
Thermal Expansion
13.50 µm/(m·K)  
33
12.60 µm/(m·K)  
40
Enthalpy
  
  
Enthalpy of Vaporization
323.80 kJ/mol  
99+
580.00 kJ/mol  
12
Enthalpy of Fusion
14.80 kJ/mol  
24
-  
Enthalpy of Atomization
-  
580.00 kJ/mol  
14
Standard Molar Entropy
63.00 J/mol.K  
24
57.00 J/mol.K  
30
Periodic Table >>
<< All

Compare Actinide Series

Actinide Series

Actinide Series

» More Actinide Series

Compare Actinide Series

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