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Md Element
Mendelevium


Periodic Table
Symbol
Md
Group Number
3 15
Period Number
7 1
Block
f block
Element Family
Actinide
CAS Number
7440111 68
Space Group Name
-
Space Group Number
194.00 7
Facts
Interesting Facts
  • Mendelevium metal is synthetically produced metal.
  • Mendelevium metal has been produced in only trace amount.
Sources
Bombarding Einsteinium with Helium Ions
History
Who Discovered
Lawrence Berkeley National Laboratory
Discovery
In 1955
Abundance
Abundance In Universe
0.00 % 40
Abundance In Sun
-
Abundance In Meteorites
0.00 % 54
Abundance In Earth's Crust
-
Abundance In Oceans
-
Abundance In Humans
0.00 % 24
Uses
Uses & Benefits
  • Currently known uses of Mendelevium metal are limited to research purpose only.
Industrial Uses
-
Medical Uses
-
Other Uses
-
Biological Properties
Toxicity
-
Present in Human Body
No
In Blood
0.00 Blood/mg dm-3 40
In Bone
0.00 p.p.m. 41
Physical
Melting Point
827.00 °C 53
Boiling Point
0.00 °C 82
Appearance
Physical State
Solid
Color
-
Luster
Metallic
Hardness
Mohs Hardness
-
Brinell Hardness
350.00 MPa 36
Vickers Hardness
0.00 MPa 75
Speed of Sound
2,680.00 m/s 48
Optical Properties
Refractive Index
1.30 43
Reflectivity
66.00 % 17
Allotropes
No
α Allotropes
-
β Allotropes
-
γ Allotropes
-
Chemical
Chemical Formula
Md
Isotopes
Known Isotopes
16 23
Electronegativity
Pauling Electronegativity
1.30 33
Sanderson Electronegativity
1.30 25
Allred Rochow Electronegativity
1.20 28
Mulliken-Jaffe Electronegativity
1.30 33
Allen Electronegativity
1.30 40
Electropositivity
Pauling Electropositivity
2.70 22
Ionization Energies
1st Energy Level
635.00 kJ/mol 45
2nd Energy Level
1,235.00 kJ/mol 58
3rd Energy Level
2,470.00 kJ/mol 48
4th Energy Level
3,840.00 kJ/mol 54
5th Energy Level
6,350.00 kJ/mol 36
6th Energy Level
6,350.00 kJ/mol 52
7th Energy level
6,350.00 kJ/mol 46
8th Energy Level
6,350.00 kJ/mol 44
9th Energy Level
6,350.00 kJ/mol 41
10th Energy Level
6,350.00 kJ/mol 42
11th Energy Level
6,400.00 kJ/mol 45
12th Energy Level
60,100.00 kJ/mol 16
13th Energy Level
6,350.00 kJ/mol 37
14th Energy Level
1,150.00 kJ/mol 65
15th Energy Level
63,500.00 kJ/mol 37
16th Energy Level
635.00 kJ/mol 79
17th Energy Level
1,107.00 kJ/mol 21
18th Energy Level
6,350.00 kJ/mol 39
19th Energy Level
635.00 kJ/mol 45
20th Energy Level
635.00 kJ/mol 40
21st Energy Level
6,350.00 kJ/mol 13
22nd Energy Level
635.00 kJ/mol 34
23rd Energy Level
6,350.00 kJ/mol 13
24th Energy Level
635.00 kJ/mol 36
25th Energy Level
635.00 kJ/mol 38
26th Energy Level
635.00 kJ/mol 37
27th Energy Level
635.00 kJ/mol 39
28th Energy Level
635.00 kJ/mol 44
29th Energy Level
635.00 kJ/mol 45
30th Energy Level
635.00 kJ/mol 40
Electrochemical Equivalent
3.21 g/amp-hr 13
Electron Work Function
3.89 eV 37
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
Atomic
Atomic Number
101 17
Electron Configuration
[Rn] 5f13 7s2
Crystal Structure
Not Known
Crystal Lattice
Unknown-Crystal-Structure-of-Mendelevium.jpg#100
Atom
Number of Protons
101 17
Number of Neutrons
157 8
Number of Electrons
101 17
Radius of an Atom
Atomic Radius
175.00 pm 21
Covalent Radius
175.00 pm 25
Van der Waals Radius
246.00 pm 12
Atomic Weight
258.00 amu 14
Atomic Volume
19.90 cm3/mol 32
Adjacent Atomic Numbers
Previous Element
88
Next Element
84
Valence Electron Potential
63.70 (-eV) 23
Lattice Constant
-
Lattice Angles
-
Lattice C/A Ratio
1.58 36
Mechanical
Density
Density At Room Temperature
10.30 g/cm3 38
Density When Liquid (at m.p.)
10.30 g/cm3 39
Tensile Strength
80.00 MPa 29
Viscosity
0.00 25
Vapor Pressure
Vapor Pressure at 1000 K
0.00 (Pa) 37
Vapor Pressure at 2000 K
0.00 (Pa) 37
Elasticity properties
Shear Modulus
32.00 GPa 24
Bulk Modulus
0.00 GPa 67
Young's Modulus
12.00 GPa 64
Poisson Ratio
0.30 14
Other Mechanical Properties
-
Magnetic
Magnetic Characteristics
Specific Gravity
13.50 29
Magnetic Ordering
-
Permeability
0.00 H/m 11
Susceptibility
0.00 24
Electrical Properties
Electrical Property
-
Resistivity
0.63 nΩ·m 80
Electrical Conductivity
0.00 106/cm Ω 71
Electron Affinity
50.00 kJ/mol 26
Thermal
Specific Heat
0.10 J/(kg K) 44
Molar Heat Capacity
27.00 J/mol·K 29
Thermal Conductivity
0.00 W/m·K 80
Critical Temperature
1,100.00 K 56
Thermal Expansion
11.60 µm/(m·K) 46
Enthalpy
Enthalpy of Vaporization
380.50 kJ/mol 26
Enthalpy of Fusion
-
Enthalpy of Atomization
410.80 kJ/mol 25
Standard Molar Entropy
37.40 J/mol.K 56
Summary >>
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