Symbol
Es
  
Ba
  
Group Number
Not Available
  
Period Number
7
  
6
  
Block
f block
  
s block
  
Element Family
Actinide
  
Alkaline Earth
  
Space Group Name
Not Available
  
Im_ 3m
  
Space Group Number
Not Available
  
Interesting Facts
- Einsteinium is the transuranic element found in US.
- Only 0.01 mg of Einsteinium was synthesized in 1961.
  
- Barium oxidizes very easily in the air.
- All toxic compounds of Barium can easily dissolve in water.
- Barium carbonate is used to produce a Rat poison and its other compound Barium nitrate is used in fireworks to produce green color.
  
Sources
Made by Bombarding Uranium with Neutrons
  
Earth's crust, Found in Minerals, Mining, Ores of Minerals
  
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory
  
Carl Wilhelm Scheele
  
Discovery
In 1952
  
In 1772
  
Abundance
  
  
Abundance In Universe
Not Available
  
Abundance In Sun
~-9999 %
  
~0.000001 %
  
18
Abundance In Meteorites
Not Available
  
Abundance In Earth's Crust
Not Available
  
Abundance In Oceans
Not Available
  
Abundance In Humans
Not Available
  
Uses & Benefits
- Currently known uses of Einsteinium metal are limited to research purpose only.
  
- It is sued in chemical paint manufacturing and glass manufacturing.
-
Compounds of this metal are toxic; but still the barium sulfate is insoluble and given to patients suffering from digestive disorder.
  
Industrial Uses
NA
  
Ammunition Industry, Automobile Industry, Electrical Industry, Electronic Industry
  
Medical Uses
NA
  
NA
  
Other Uses
Alloys, Nuclear Research, Research Purposes
  
Alloys
  
Biological Properties
  
  
Toxicity
Toxic
  
Low Toxic
  
Present in Human Body
No
  
Yes
  
In Blood
0.00 Blood/mg dm-3
  
37
0.07 Blood/mg dm-3
  
15
In Bone
0.00 p.p.m.
  
36
70.00 p.p.m.
  
9
Boiling Point
1,140.00 °C
  
99+
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Silver
  
Silvery Gray
  
Luster
NA
  
NA
  
Hardness
  
  
Mohs Hardness
Not Available
  
Speed of Sound
Not Available
  
1,620.00 m/s
  
99+
Optical Properties
  
  
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Es
  
Ba
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Not Available
  
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Not Available
  
Allen Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
619.00 kJ/mol
  
99+
502.90 kJ/mol
  
99+
2nd Energy Level
1,216.00 kJ/mol
  
99+
965.20 kJ/mol
  
99+
3rd Energy Level
2,334.00 kJ/mol
  
99+
3,600.00 kJ/mol
  
14
4th Energy Level
3,734.00 kJ/mol
  
99+
Not Available
  
Electrochemical Equivalent
4.74 g/amp-hr
  
5
2.56 g/amp-hr
  
20
Electron Work Function
Not Available
  
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
  
Ionization, Radioactive Isotopes, Radioactivity, Solubility
  
Electron Configuration
[Rn] 5f11 7s2
  
[Xe] 6s2
  
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
  
  
Radius of an Atom
  
  
Covalent Radius
Not Available
  
Van der Waals Radius
Not Available
  
Atomic Weight
137.33 amu
  
99+
Atomic Volume
Not Available
  
39.24 cm3/mol
  
5
Adjacent Atomic Numbers
  
  
Valence Electron Potential
Not Available
  
21.30 (-eV)
  
99+
Lattice Constant
Not Available
  
Lattice Angles
NA
  
π/2, π/2, π/2
  
Lattice C/A Ratio
Not Available
  
Not Available
  
Density
  
  
Density At Room Temperature
8.84 g/cm3
  
99+
3.51 g/cm3
  
99+
Density When Liquid (at m.p.)
Not Available
  
3.34 g/cm3
  
99+
Tensile Strength
Not Available
  
Not Available
  
Viscosity
Not Available
  
Not Available
  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available
  
Elasticity properties
  
  
Shear Modulus
Not Available
  
Bulk Modulus
Not Available
  
Young's Modulus
Not Available
  
Poisson Ratio
Not Available
  
Not Available
  
Other Mechanical Properties
NA
  
NA
  
Magnetic Characteristics
  
  
Specific Gravity
Not Available
  
Magnetic Ordering
Paramagnetic
  
Paramagnetic
  
Electrical Properties
  
  
Electrical Property
Unknown
  
Superconductor
  
Resistivity
Not Available
  
332.00 nΩ·m
  
13
Electrical Conductivity
Not Available
  
0.03 10
6/cm Ω
  
40
Electron Affinity
Not Available
  
13.95 kJ/mol
  
36
Specific Heat
Not Available
  
0.20 J/(kg K)
  
30
Molar Heat Capacity
Not Available
  
28.07 J/mol·K
  
12
Thermal Conductivity
Not Available
  
18.40 W/m·K
  
99+
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
Not Available
  
20.60 µm/(m·K)
  
22
Enthalpy
  
  
Enthalpy of Vaporization
Not Available
  
140.00 kJ/mol
  
99+
Enthalpy of Fusion
Not Available
  
7.66 kJ/mol
  
99+
Enthalpy of Atomization
Not Available
  
175.70 kJ/mol
  
99+
Standard Molar Entropy
Not Available
  
62.50 J/mol.K
  
20