Symbol
Es
Group Number
13
Rank: 5 (Overall)
0
17
👆🏻
Period Number
7
Rank: 1 (Overall)
2
7
👆🏻
Block
f block
Element Family
Actinide
CAS Number
7429927
Rank: 90 (Overall)
7429905
54386242
👆🏻
Space Group Name
-
Space Group Number
194.00
Rank: 7 (Overall)
11
276
👆🏻
Interesting Facts
- Einsteinium is the transuranic element found in US.
- Only 0.01 mg of Einsteinium was synthesized in 1961.
Sources
Made by Bombarding Uranium with Neutrons
History
Who Discovered
Lawrence Berkeley National Laboratory
Discovery
In 1952
Abundance
Abundance In Universe
0.00 %
Rank: 35 (Overall)
0
0.11
👆🏻
Abundance In Sun
0.00 %
Rank: 30 (Overall)
0
0.1
👆🏻
Abundance In Meteorites
0.00 %
Rank: 54 (Overall)
0
22
👆🏻
Abundance In Earth's Crust
0.00 %
Rank: 60 (Overall)
1E-37
8.1
👆🏻
Abundance In Oceans
-
0
1.1
👆🏻
Abundance In Humans
0.00 %
Rank: 24 (Overall)
0
1.4
👆🏻
Uses & Benefits
- Currently known uses of Einsteinium metal are limited to research purpose only.
Industrial Uses
-
Medical Uses
-
Other Uses
Alloys, Nuclear Research, Research Purposes
Biological Properties
Toxicity
Toxic
Present in Human Body
✔
✘
7% - Actinide Series Metals
In Blood
0.00 Blood/mg dm-3
Rank: 40 (Overall)
0
1970
👆🏻
In Bone
0.00 p.p.m.
Rank: 41 (Overall)
0
170000
👆🏻
Melting Point
860.00 °C
Rank: 51 (Overall)
-38.83
3410
👆🏻
Boiling Point
996.00 °C
Rank: 70 (Overall)
0
5660
👆🏻
Appearance
Physical State
Solid
Color
Silver
Luster
-
Hardness
Mohs Hardness
6.00
Rank: 6 (Overall)
0.2
8.5
👆🏻
Brinell Hardness
240.00 MPa
Rank: 46 (Overall)
0.14
3490
👆🏻
Vickers Hardness
550.00 MPa
Rank: 31 (Overall)
0
3920
👆🏻
Speed of Sound
2,850.00 m/s
Rank: 40 (Overall)
818
16200
👆🏻
Optical Properties
Refractive Index
1.30
Rank: 43 (Overall)
0.155
3.41
👆🏻
Reflectivity
63.00 %
Rank: 20 (Overall)
5
97
👆🏻
Allotropes
✔
✘
No - Actinide Series Metals has it !
α Allotropes
-
β Allotropes
-
γ Allotropes
-
Chemical Formula
Es
Isotopes
Known Isotopes
16
Rank: 23 (Overall)
0
38
👆🏻
Electronegativity
Pauling Electronegativity
1.54
Rank: 27 (Overall)
0
2.6
👆🏻
Sanderson Electronegativity
1.30
Rank: 25 (Overall)
0.22
2.56
👆🏻
Allred Rochow Electronegativity
1.20
Rank: 28 (Overall)
0.86
1.9
👆🏻
Mulliken-Jaffe Electronegativity
1.30
Rank: 33 (Overall)
0.62
2.48
👆🏻
Allen Electronegativity
1.30
Rank: 40 (Overall)
0.659
2.7
👆🏻
Electropositivity
Pauling Electropositivity
2.70
Rank: 22 (Overall)
1.46
3.3
👆🏻
Ionization Energies
1st Energy Level
619.00 kJ/mol
Rank: 48 (Overall)
375.7
26130
👆🏻
2nd Energy Level
1,216.00 kJ/mol
Rank: 60 (Overall)
392.8
28750
👆🏻
3rd Energy Level
2,334.00 kJ/mol
Rank: 56 (Overall)
392.8
34230
👆🏻
4th Energy Level
3,734.00 kJ/mol
Rank: 58 (Overall)
375.7
37066
👆🏻
5th Energy Level
6,190.00 kJ/mol
Rank: 40 (Overall)
392
97510
👆🏻
6th Energy Level
6,190.00 kJ/mol
Rank: 54 (Overall)
1007
105800
👆🏻
7th Energy level
6,190.00 kJ/mol
Rank: 48 (Overall)
1007
114300
👆🏻
8th Energy Level
6,190.00 kJ/mol
Rank: 46 (Overall)
730
125300
👆🏻
9th Energy Level
4,520.00 kJ/mol
Rank: 80 (Overall)
1007
134700
👆🏻
10th Energy Level
6,190.00 kJ/mol
Rank: 44 (Overall)
392
144300
👆🏻
11th Energy Level
6,190.00 kJ/mol
Rank: 49 (Overall)
392
169988
👆🏻
12th Energy Level
61,900.00 kJ/mol
Rank: 12 (Overall)
0
189368
👆🏻
13th Energy Level
6,190.00 kJ/mol
Rank: 39 (Overall)
1007
76015
👆🏻
14th Energy Level
6,190.00 kJ/mol
Rank: 28 (Overall)
380
86450
👆🏻
15th Energy Level
61,900.00 kJ/mol
Rank: 40 (Overall)
33000
100700
👆🏻
16th Energy Level
61,900.00 kJ/mol
Rank: 30 (Overall)
375.7
109480
👆🏻
17th Energy Level
619.00 kJ/mol
Rank: 50 (Overall)
375.7
122200
👆🏻
18th Energy Level
6,190.00 kJ/mol
Rank: 41 (Overall)
0
134810
👆🏻
19th Energy Level
619.00 kJ/mol
Rank: 47 (Overall)
375.7
148700
👆🏻
20th Energy Level
619.00 kJ/mol
Rank: 44 (Overall)
0
171200
👆🏻
21st Energy Level
6,190.00 kJ/mol
Rank: 15 (Overall)
375.7
179100
👆🏻
22nd Energy Level
619.00 kJ/mol
Rank: 38 (Overall)
330
184900
👆🏻
23rd Energy Level
6,190.00 kJ/mol
Rank: 15 (Overall)
357.6
198800
👆🏻
24th Energy Level
619.40 kJ/mol
Rank: 40 (Overall)
297.3
195200
👆🏻
25th Energy Level
619.00 kJ/mol
Rank: 41 (Overall)
0
121900
👆🏻
26th Energy Level
619.40 kJ/mol
Rank: 40 (Overall)
357.6
127700
👆🏻
27th Energy Level
619.40 kJ/mol
Rank: 42 (Overall)
0
133800
👆🏻
28th Energy Level
619.40 kJ/mol
Rank: 47 (Overall)
297.3
139800
👆🏻
29th Energy Level
619.40 kJ/mol
Rank: 48 (Overall)
0
148100
👆🏻
30th Energy Level
619.40 kJ/mol
Rank: 44 (Overall)
0
154500
👆🏻
Electrochemical Equivalent
4.74 g/amp-hr
Rank: 5 (Overall)
0.16812
8.3209
👆🏻
Electron Work Function
4.90 eV
Rank: 12 (Overall)
2.14
6
👆🏻
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
Atomic Number
99
Rank: 19 (Overall)
3
117
👆🏻
Electron Configuration
[Rn] 5f11 7s2
Crystal Structure
Face Centered Cubic (FCC)
Crystal Lattice
Atom
Number of Protons
99
Rank: 19 (Overall)
3
117
👆🏻
Number of Neutrons
153
Rank: 10 (Overall)
4
285
👆🏻
Number of Electrons
99
Rank: 19 (Overall)
3
117
👆🏻
Radius of an Atom
Atomic Radius
186.00 pm
Rank: 11 (Overall)
0
348
👆🏻
Covalent Radius
186.00 pm
Rank: 21 (Overall)
0
260
👆🏻
Van der Waals Radius
0.00 pm
Rank: 53 (Overall)
0
348
👆🏻
Atomic Weight
252.00 amu
Rank: 16 (Overall)
6.94
294
👆🏻
Atomic Volume
17.04 cm3/mol
Rank: 46 (Overall)
1.39
71.07
👆🏻
Adjacent Atomic Numbers
Previous Element
Next Element
Valence Electron Potential
0.00 (-eV)
Rank: 78 (Overall)
0
392.42
👆🏻
Lattice Constant
582.00 pm
Rank: 8 (Overall)
0
891.25
👆🏻
Lattice Angles
-
Lattice C/A Ratio
1.29
Rank: 57 (Overall)
0.423
1.9
👆🏻
Density
Density At Room Temperature
8.84 g/cm3
Rank: 50 (Overall)
0.534
40.7
👆🏻
Density When Liquid (at m.p.)
8.84 g/cm3
Rank: 49 (Overall)
0.512
41
👆🏻
Tensile Strength
0.10 MPa
Rank: 52 (Overall)
0.1
11000
👆🏻
Viscosity
0.00
Rank: 25 (Overall)
1.5E-05
0.0035
👆🏻
Vapor Pressure
Vapor Pressure at 1000 K
0.00 (Pa)
Rank: 22 (Overall)
0
121
👆🏻
Vapor Pressure at 2000 K
0.00 (Pa)
Rank: 24 (Overall)
0
774
👆🏻
Elasticity properties
Shear Modulus
30.00 GPa
Rank: 27 (Overall)
1.3
222
👆🏻
Bulk Modulus
40.00 GPa
Rank: 38 (Overall)
0
462
👆🏻
Young's Modulus
0.00 GPa
Rank: 74 (Overall)
0
528
👆🏻
Poisson Ratio
0.33
Rank: 11 (Overall)
0.032
0.47
👆🏻
Other Mechanical Properties
-
Magnetic Characteristics
Specific Gravity
8.84
Rank: 50 (Overall)
0.53
4500
👆🏻
Magnetic Ordering
Paramagnetic
Permeability
0.00 H/m
Rank: 17 (Overall)
1.25643E-06
0.0063
👆🏻
Susceptibility
0.00
Rank: 24 (Overall)
-0.000166
200000
👆🏻
Electrical Properties
Electrical Property
-
Resistivity
6.30 nΩ·m
Rank: 59 (Overall)
0.1
961
👆🏻
Electrical Conductivity
0.14 106/cm Ω
Rank: 15 (Overall)
0
0.63
👆🏻
Electron Affinity
0.00 kJ/mol
Rank: 49 (Overall)
0
222.8
👆🏻
Specific Heat
0.10 J/(kg K)
Rank: 44 (Overall)
0.1
3.6
👆🏻
Molar Heat Capacity
27.20 J/mol·K
Rank: 24 (Overall)
13.1
62.7
👆🏻
Thermal Conductivity
0.00 W/m·K
Rank: 80 (Overall)
0
429
👆🏻
Critical Temperature
1,133.00 K
Rank: 54 (Overall)
26.3
3695
👆🏻
Thermal Expansion
13.50 µm/(m·K)
Rank: 33 (Overall)
4.5
97
👆🏻
Enthalpy
Enthalpy of Vaporization
323.80 kJ/mol
Rank: 43 (Overall)
7.32
799.1
👆🏻
Enthalpy of Fusion
14.80 kJ/mol
Rank: 24 (Overall)
2.1
35.23
👆🏻
Enthalpy of Atomization
-
61.5
837
👆🏻
Standard Molar Entropy
63.00 J/mol.K
Rank: 24 (Overall)
9.5
198.1
👆🏻