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Einsteinium vs Nobelium


Nobelium vs Einsteinium


Periodic Table

Symbol
Es   
No   

Group Number
Not Available   
Not Available   

Period Number
7   
7   

Block
f block   
f block   

Element Family
Actinide   
Actinide   

CAS Number
7429927   
99+
10028145   
16

Space Group Name
Not Available   
Not Available   

Space Group Number
Not Available   
Not Available   

Facts

Interesting Facts
  • Einsteinium is the transuranic element found in US.
  • Only 0.01 mg of Einsteinium was synthesized in 1961.
  
  • The most stable isotope of Nobelium metal is No-259.
  • No-259 has a half-life of fifty-eight minutes.
  

Sources
Made by Bombarding Uranium with Neutrons   
Bombarding Curium-246 or Curium-249 with Carbon-12 Nuclei, Found in Minerals, Mining   

History
  
  

Who Discovered
Lawrence Berkeley National Laboratory   
Joint Institute for Nuclear Research   

Discovery
In 1952   
In 1966   

Abundance
  
  

Uses

Uses & Benefits
  • Currently known uses of Einsteinium metal are limited to research purpose only.
  
  • Currently known uses of Nobelium metal are limited to research purpose only.
  

Industrial Uses
NA   
NA   

Medical Uses
NA   
NA   

Other Uses
Alloys, Nuclear Research, Research Purposes   
Research Purposes   

Biological Properties
  
  

Toxicity
Toxic   
Unknown   

Present in Human Body
No   
No   

In Blood
0.00 Blood/mg dm-3   
37
0.00 Blood/mg dm-3   
37

In Bone
0.00 p.p.m.   
36
0.00 p.p.m.   
36

Physical Properties

Melting Point
860.00 °C   
99+
827.00 °C   
99+

Boiling Point
996.00 °C   
99+
Not Available   

Appearance
  
  

Physical State
Solid   
Solid   

Color
Silver   
Unknown   

Luster
NA   
Unknown Luster   

Hardness
  
  

Speed of Sound
Not Available   
Not Available   

Optical Properties
  
  

Allotropes
No   
No   

α Allotropes
Not Available   
Not Available   

β Allotropes
Not Available   
Not Available   

γ Allotropes
Not Available   
Not Available   

Chemical Properties

Chemical Formula
Es   
No   

Isotopes
  
  

Known Isotopes
16   
23
13   
26

Electronegativity
  
  

Pauling Electronegativity
1.54   
26
1.30   
32

Allred Rochow Electronegativity
1.20   
27
1.20   
27

Electropositivity
  
  

Pauling Electropositivity
2.70   
22
2.70   
22

Ionization Energies
  
  

1st Energy Level
619.00 kJ/mol   
99+
642.00 kJ/mol   
99+

2nd Energy Level
1,216.00 kJ/mol   
99+
1,254.00 kJ/mol   
99+

3rd Energy Level
2,334.00 kJ/mol   
99+
2,643.00 kJ/mol   
99+

4th Energy Level
3,734.00 kJ/mol   
99+
3,956.00 kJ/mol   
39

Electrochemical Equivalent
4.74 g/amp-hr   
5
4.83 g/amp-hr   
4

Electron Work Function
Not Available   
Not Available   

Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Ionization, Radioactive Isotopes, Radioactivity   

Atomic Properties

Atomic Number
99   
19
102   
16

Electron Configuration
[Rn] 5f11 7s2   
[Rn] 5f14 7s2   

Crystal Structure
Face Centered Cubic (FCC)   
Not Known   

Crystal Lattice
FCC-Crystal-Structure-of-Einsteinium.jpg#100   
Unknown-Crystal-Structure-of-Nobelium.jpg#100   

Atom
  
  

Number of Protons
99   
19
102   
16

Number of Neutrons
153   
9
157   
7

Number of Electrons
99   
19
102   
16

Radius of an Atom
  
  

Atomic Radius
186.00 pm   
9
Not Available   

Van der Waals Radius
Not Available   
246.00 pm   
8

Atomic Weight
252.00 amu   
16
259.00 amu   
13

Atomic Volume
Not Available   
Not Available   

Adjacent Atomic Numbers
  
  

Previous Element

Next Element
Fermium
  
Lawrencium
  

Valence Electron Potential
Not Available   
26.00 (-eV)   
99+

Lattice Constant
Not Available   
Not Available   

Lattice Angles
NA   
NA   

Lattice C/A Ratio
Not Available   
Not Available   

Mechanical Properties

Density
  
  

Density At Room Temperature
8.84 g/cm3   
99+
Not Available   

Tensile Strength
Not Available   
Not Available   

Viscosity
Not Available   
Not Available   

Vapor Pressure
  
  

Elasticity properties
  
  

Poisson Ratio
Not Available   
Not Available   

Other Mechanical Properties
NA   
Unknown   

Magnetic Properties

Magnetic Characteristics
  
  

Magnetic Ordering
Paramagnetic   
Unknown   

Electrical Properties
  
  

Thermal Properties

Specific Heat
Not Available   
Not Available   

Molar Heat Capacity
Not Available   
Not Available   

Thermal Conductivity
Not Available   
Not Available   

Critical Temperature
Not Available   
Not Available   

Thermal Expansion
Not Available   
Not Available   

Enthalpy
  
  

Standard Molar Entropy
Not Available   
Not Available   

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