Symbol
Mt
Es
Group Number
913
0
17
👆🏻
Period Number
77
2
7
👆🏻
Block
d block
f block
Element Family
Probably Transition
Actinide
CAS Number
540380167429927
7429905
54386242
👆🏻
Space Group Name
-
-
Space Group Number
166.00194.00
11
276
👆🏻
Interesting Facts
Meitnerium is named after Lise Meitner, an Austrian physicist.
- Einsteinium is the transuranic element found in US.
- Only 0.01 mg of Einsteinium was synthesized in 1961.
Sources
Bombarding Bi209 with Accelerated Nuclei of Fe58, Synthetically Produced
Made by Bombarding Uranium with Neutrons
History
Who Discovered
Gesellschaft für Schwerionenforschung
Lawrence Berkeley National Laboratory
Discovery
In 1982
In 1952
Abundance
Abundance In Universe
0.00 %0.00 %
0
0.11
👆🏻
Abundance In Sun
-0.00 %
0
0.1
👆🏻
Abundance In Meteorites
0.00 %0.00 %
0
22
👆🏻
Abundance In Earth's Crust
-0.00 %
1E-37
8.1
👆🏻
Abundance In Oceans
--
0
1.1
👆🏻
Abundance In Humans
-0.00 %
0
1.4
👆🏻
Uses & Benefits
- Currently known uses of Meitnerium metal are limited to research purpose only.
- 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
✔
✘
✔
✘
In Blood
0.00 Blood/mg dm-30.00 Blood/mg dm-3
0
1970
👆🏻
In Bone
0.00 p.p.m.0.00 p.p.m.
0
170000
👆🏻
Melting Point
-860.00 °C
-38.83
3410
👆🏻
Boiling Point
0.00 °C996.00 °C
0
5660
👆🏻
Appearance
Physical State
Solid
Solid
Color
-
Silver
Luster
Unknown Luster
-
Hardness
Mohs Hardness
-6.00
0.2
8.5
👆🏻
Brinell Hardness
400.00 MPa240.00 MPa
0.14
3490
👆🏻
Vickers Hardness
350.00 MPa550.00 MPa
0
3920
👆🏻
Speed of Sound
3,200.00 m/s2,850.00 m/s
818
16200
👆🏻
Optical Properties
Refractive Index
1.301.30
0.155
3.41
👆🏻
Reflectivity
68.00 %63.00 %
5
97
👆🏻
Allotropes
✔
✘
✔
✘
α Allotropes
-
-
β Allotropes
-
-
γ Allotropes
-
-
Chemical Formula
Mt
Es
Isotopes
Known Isotopes
416
0
38
👆🏻
Electronegativity
Pauling Electronegativity
1.301.54
0
2.6
👆🏻
Sanderson Electronegativity
1.901.30
0.22
2.56
👆🏻
Allred Rochow Electronegativity
1.301.20
0.86
1.9
👆🏻
Mulliken-Jaffe Electronegativity
1.301.30
0.62
2.48
👆🏻
Allen Electronegativity
1.301.30
0.659
2.7
👆🏻
Electropositivity
Pauling Electropositivity
2.002.70
1.46
3.3
👆🏻
Ionization Energies
1st Energy Level
800.80 kJ/mol619.00 kJ/mol
375.7
26130
👆🏻
2nd Energy Level
1,823.60 kJ/mol1,216.00 kJ/mol
392.8
28750
👆🏻
3rd Energy Level
2,904.20 kJ/mol2,334.00 kJ/mol
392.8
34230
👆🏻
4th Energy Level
3,859.40 kJ/mol3,734.00 kJ/mol
375.7
37066
👆🏻
5th Energy Level
4,920.80 kJ/mol6,190.00 kJ/mol
392
97510
👆🏻
6th Energy Level
8,000.00 kJ/mol6,190.00 kJ/mol
1007
105800
👆🏻
7th Energy level
8,000.00 kJ/mol6,190.00 kJ/mol
1007
114300
👆🏻
8th Energy Level
8,000.00 kJ/mol6,190.00 kJ/mol
730
125300
👆🏻
9th Energy Level
6,700.00 kJ/mol4,520.00 kJ/mol
1007
134700
👆🏻
10th Energy Level
5,800.00 kJ/mol6,190.00 kJ/mol
392
144300
👆🏻
11th Energy Level
6,300.00 kJ/mol6,190.00 kJ/mol
392
169988
👆🏻
12th Energy Level
0.00 kJ/mol61,900.00 kJ/mol
0
189368
👆🏻
13th Energy Level
8,000.00 kJ/mol6,190.00 kJ/mol
1007
76015
👆🏻
14th Energy Level
1,156.00 kJ/mol6,190.00 kJ/mol
380
86450
👆🏻
15th Energy Level
80,000.00 kJ/mol61,900.00 kJ/mol
33000
100700
👆🏻
16th Energy Level
58,700.00 kJ/mol61,900.00 kJ/mol
375.7
109480
👆🏻
17th Energy Level
1,110.00 kJ/mol619.00 kJ/mol
375.7
122200
👆🏻
18th Energy Level
8,000.00 kJ/mol6,190.00 kJ/mol
0
134810
👆🏻
19th Energy Level
1,110.00 kJ/mol619.00 kJ/mol
375.7
148700
👆🏻
20th Energy Level
850.00 kJ/mol619.00 kJ/mol
0
171200
👆🏻
21st Energy Level
800.00 kJ/mol6,190.00 kJ/mol
375.7
179100
👆🏻
22nd Energy Level
380.00 kJ/mol619.00 kJ/mol
330
184900
👆🏻
23rd Energy Level
8,000.00 kJ/mol6,190.00 kJ/mol
357.6
198800
👆🏻
24th Energy Level
565.60 kJ/mol619.40 kJ/mol
297.3
195200
👆🏻
25th Energy Level
800.00 kJ/mol619.00 kJ/mol
0
121900
👆🏻
26th Energy Level
800.00 kJ/mol619.40 kJ/mol
357.6
127700
👆🏻
27th Energy Level
800.00 kJ/mol619.40 kJ/mol
0
133800
👆🏻
28th Energy Level
800.00 kJ/mol619.40 kJ/mol
297.3
139800
👆🏻
29th Energy Level
800.00 kJ/mol619.40 kJ/mol
0
148100
👆🏻
30th Energy Level
800.00 kJ/mol619.40 kJ/mol
0
154500
👆🏻
Electrochemical Equivalent
3.00 g/amp-hr4.74 g/amp-hr
0.16812
8.3209
👆🏻
Electron Work Function
4.90 eV4.90 eV
2.14
6
👆🏻
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
Ionization, Radioactive Isotopes, Radioactivity
Atomic Number
10999
3
117
👆🏻
Electron Configuration
[Rn] 5f14 6d7 7s2
[Rn] 5f11 7s2
Crystal Structure
Face Centered Cubic (FCC)
Face Centered Cubic (FCC)
Crystal Lattice
Atom
Number of Protons
10999
3
117
👆🏻
Number of Neutrons
157153
4
285
👆🏻
Number of Electrons
10999
3
117
👆🏻
Radius of an Atom
Atomic Radius
122.00 pm186.00 pm
0
348
👆🏻
Covalent Radius
129.00 pm186.00 pm
0
260
👆🏻
Van der Waals Radius
260.00 pm0.00 pm
0
348
👆🏻
Atomic Weight
278.00 amu252.00 amu
6.94
294
👆🏻
Atomic Volume
20.20 cm3/mol17.04 cm3/mol
1.39
71.07
👆🏻
Adjacent Atomic Numbers
Previous Element
Next Element
Valence Electron Potential
31.20 (-eV)0.00 (-eV)
0
392.42
👆🏻
Lattice Constant
0.00 pm582.00 pm
0
891.25
👆🏻
Lattice Angles
-
-
Lattice C/A Ratio
1.591.29
0.423
1.9
👆🏻
Density
Density At Room Temperature
37.40 g/cm38.84 g/cm3
0.534
40.7
👆🏻
Density When Liquid (at m.p.)
37.40 g/cm38.84 g/cm3
0.512
41
👆🏻
Tensile Strength
80.00 MPa0.10 MPa
0.1
11000
👆🏻
Viscosity
0.000.00
1.5E-05
0.0035
👆🏻
Vapor Pressure
Vapor Pressure at 1000 K
0.00 (Pa)0.00 (Pa)
0
121
👆🏻
Vapor Pressure at 2000 K
0.00 (Pa)0.00 (Pa)
0
774
👆🏻
Elasticity properties
Shear Modulus
35.00 GPa30.00 GPa
1.3
222
👆🏻
Bulk Modulus
0.00 GPa40.00 GPa
0
462
👆🏻
Young's Modulus
13.50 GPa0.00 GPa
0
528
👆🏻
Poisson Ratio
0.250.33
0.032
0.47
👆🏻
Other Mechanical Properties
-
-
Magnetic Characteristics
Specific Gravity
37.408.84
0.53
4500
👆🏻
Magnetic Ordering
Paramagnetic
Paramagnetic
Permeability
0.00 H/m0.00 H/m
1.25643E-06
0.0063
👆🏻
Susceptibility
0.000.00
-0.000166
200000
👆🏻
Electrical Properties
Electrical Property
-
-
Resistivity
0.35 nΩ·m6.30 nΩ·m
0.1
961
👆🏻
Electrical Conductivity
0.00 106/cm Ω0.14 106/cm Ω
0
0.63
👆🏻
Electron Affinity
50.00 kJ/mol0.00 kJ/mol
0
222.8
👆🏻
Specific Heat
0.10 J/(kg K)0.10 J/(kg K)
0.1
3.6
👆🏻
Molar Heat Capacity
27.00 J/mol·K27.20 J/mol·K
13.1
62.7
👆🏻
Thermal Conductivity
0.00 W/m·K0.00 W/m·K
0
429
👆🏻
Critical Temperature
1,323.00 K1,133.00 K
26.3
3695
👆🏻
Thermal Expansion
10.30 µm/(m·K)13.50 µm/(m·K)
4.5
97
👆🏻
Enthalpy
Enthalpy of Vaporization
110.00 kJ/mol323.80 kJ/mol
7.32
799.1
👆🏻
Enthalpy of Fusion
-14.80 kJ/mol
2.1
35.23
👆🏻
Enthalpy of Atomization
350.20 kJ/mol-
61.5
837
👆🏻
Standard Molar Entropy
63.80 J/mol.K63.00 J/mol.K
9.5
198.1
👆🏻