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Mendelevium Cobalt Comparison

Mendelevium
Cobalt
Cobalt Mendelevium comparison


Periodic Table
Symbol
Md  
Co  
Group Number
3  
15
9  
9
Period Number
7  
4  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7440111  
99+
7440484  
38
Space Group Name
-  
P63/mmc  
Space Group Number
194.00  
7
194.00  
7
Facts
Interesting Facts
  • Mendelevium metal is synthetically produced metal.
  • Mendelevium metal has been produced in only trace amount.
  
  • The main source of Cobalt is as a by-product of copper and nickel metal mining.
  • Cobalt metal can be obtained from other elements like Oxygen, Sulfur and Arsenic.
  • It s also used in electroplating process as it exhibits anti cession properties.
  
Sources
Bombarding Einsteinium with Helium Ions  
Found in Compounds, Mining, Ores of Minerals  
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory  
Georg Brandt  
Discovery
In 1955  
In 1732  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
10
Abundance In Sun
-  
0.00 %  
9
Abundance In Meteorites
0.00 %  
99+
0.06 %  
10
Abundance In Earth's Crust
-  
0.00 %  
21
Abundance In Oceans
-  
0.00 %  
20
Abundance In Humans
0.00 %  
24
0.00 %  
20
Uses
Uses & Benefits
  • Currently known uses of Mendelevium metal are limited to research purpose only.
  
  • Its alloys with aluminum and nickel are used to make powerful magnets.
  • Few other alloys exhibit high-temperature strength and hence they are used in Turbines of Jet and Gas engine.
  
Industrial Uses
-  
Chemical Industry, Electrical Industry, Electronic Industry  
Medical Uses
-  
Pharmaceutical Industry  
Other Uses
-  
Alloys  
Biological Properties
  
  
Toxicity
-  
Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
40
0.04 Blood/mg dm-3  
18
In Bone
0.00 p.p.m.  
99+
0.04 p.p.m.  
32
Physical
Melting Point
827.00 °C  
99+
1,495.00 °C  
29
Boiling Point
0.00 °C  
99+
2,870.00 °C  
35
Appearance
  
  
Physical State
Solid  
Solid  
Color
-  
Gray  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
-  
5.00  
8
Brinell Hardness
350.00 MPa  
36
470.00 MPa  
31
Vickers Hardness
0.00 MPa  
99+
1,043.00 MPa  
18
Speed of Sound
2,680.00 m/s  
99+
4,720.00 m/s  
18
Optical Properties
  
  
Refractive Index
1.30  
99+
2.50  
5
Reflectivity
66.00 %  
17
67.00 %  
16
Allotropes
No  
Yes  
α Allotropes
-  
α-Cobalt  
β Allotropes
-  
β-Cobalt  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Md  
Co  
Isotopes
  
  
Known Isotopes
16  
23
26  
13
Electronegativity
  
  
Pauling Electronegativity
1.30  
33
1.88  
13
Sanderson Electronegativity
1.30  
25
2.56  
1
Allred Rochow Electronegativity
1.20  
28
1.70  
6
Mulliken-Jaffe Electronegativity
1.30  
33
1.88  
14
Allen Electronegativity
1.30  
40
1.84  
13
Electropositivity
  
  
Pauling Electropositivity
2.70  
22
2.12  
99+
Ionization Energies
  
  
1st Energy Level
635.00 kJ/mol  
99+
760.40 kJ/mol  
19
2nd Energy Level
1,235.00 kJ/mol  
99+
1,648.00 kJ/mol  
32
3rd Energy Level
2,470.00 kJ/mol  
99+
3,232.00 kJ/mol  
22
4th Energy Level
3,840.00 kJ/mol  
99+
4,950.00 kJ/mol  
29
5th Energy Level
6,350.00 kJ/mol  
36
7,670.00 kJ/mol  
18
6th Energy Level
6,350.00 kJ/mol  
99+
9,840.00 kJ/mol  
18
7th Energy level
6,350.00 kJ/mol  
99+
12,440.00 kJ/mol  
11
8th Energy Level
6,350.00 kJ/mol  
99+
15,230.00 kJ/mol  
12
9th Energy Level
6,350.00 kJ/mol  
99+
17,959.00 kJ/mol  
13
10th Energy Level
6,350.00 kJ/mol  
99+
26,570.00 kJ/mol  
7
11th Energy Level
6,400.00 kJ/mol  
99+
29,400.00 kJ/mol  
8
12th Energy Level
60,100.00 kJ/mol  
16
32,400.00 kJ/mol  
30
13th Energy Level
6,350.00 kJ/mol  
37
36,600.00 kJ/mol  
8
14th Energy Level
1,150.00 kJ/mol  
99+
39,700.00 kJ/mol  
9
15th Energy Level
63,500.00 kJ/mol  
37
42,800.00 kJ/mol  
99+
16th Energy Level
635.00 kJ/mol  
99+
49,396.00 kJ/mol  
99+
17th Energy Level
1,107.00 kJ/mol  
21
52,737.00 kJ/mol  
13
18th Energy Level
6,350.00 kJ/mol  
39
134,810.00 kJ/mol  
1
19th Energy Level
635.00 kJ/mol  
99+
145,170.00 kJ/mol  
2
20th Energy Level
635.00 kJ/mol  
40
154,700.00 kJ/mol  
4
21st Energy Level
6,350.00 kJ/mol  
13
167,400.00 kJ/mol  
4
22nd Energy Level
635.00 kJ/mol  
34
178,100.00 kJ/mol  
3
23rd Energy Level
6,350.00 kJ/mol  
13
189,300.00 kJ/mol  
3
24th Energy Level
635.00 kJ/mol  
36
760.40 kJ/mol  
17
25th Energy Level
635.00 kJ/mol  
38
760.40 kJ/mol  
17
26th Energy Level
635.00 kJ/mol  
37
760.40 kJ/mol  
17
27th Energy Level
635.00 kJ/mol  
39
760.40 kJ/mol  
16
28th Energy Level
635.00 kJ/mol  
99+
760.40 kJ/mol  
22
29th Energy Level
635.00 kJ/mol  
99+
760.40 kJ/mol  
23
30th Energy Level
635.00 kJ/mol  
40
760.40 kJ/mol  
17
Electrochemical Equivalent
3.21 g/amp-hr  
13
1.10 g/amp-hr  
99+
Electron Work Function
3.89 eV  
37
5.00 eV  
9
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Chemical Stability, Ionization  
Atomic
Atomic Number
101  
17
22  
99+
Electron Configuration
[Rn] 5f13 7s2  
[Ar] 3d2 4s2  
Crystal Structure
Not Known  
Hexagonal Close Packed (HCP)  
Crystal Lattice
Unknown-Crystal-Structure-of-Mendelevium.jpg#100  
HCP-Crystal-Structure-of-Cobalt.jpg#100  
Atom
  
  
Number of Protons
101  
17
22  
99+
Number of Neutrons
157  
8
26  
99+
Number of Electrons
101  
17
22  
99+
Radius of an Atom
  
  
Atomic Radius
175.00 pm  
21
147.00 pm  
36
Covalent Radius
175.00 pm  
25
160.00 pm  
32
Van der Waals Radius
246.00 pm  
12
200.00 pm  
35
Atomic Weight
258.00 amu  
14
47.87 amu  
99+
Atomic Volume
19.90 cm3/mol  
32
10.64 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Fermium
  
Iron
  
Next Element
Nobelium
  
Nickel
  
Valence Electron Potential
63.70 (-eV)  
23
95.20 (-eV)  
10
Lattice Constant
-  
295.08 pm  
99+
Lattice Angles
-  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.58  
36
1.26  
99+
Mechanical
Density
  
  
Density At Room Temperature
10.30 g/cm3  
38
4.51 g/cm3  
99+
Density When Liquid (at m.p.)
10.30 g/cm3  
39
4.11 g/cm3  
99+
Tensile Strength
80.00 MPa  
29
434.00 MPa  
10
Viscosity
0.00  
25
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
22
Vapor Pressure at 2000 K
0.00 (Pa)  
37
0.98 (Pa)  
14
Elasticity properties
  
  
Shear Modulus
32.00 GPa  
24
44.00 GPa  
17
Bulk Modulus
0.00 GPa  
99+
110.00 GPa  
15
Young's Modulus
12.00 GPa  
99+
116.00 GPa  
20
Poisson Ratio
0.30  
14
0.32  
12
Other Mechanical Properties
-  
Ductile  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
13.50  
29
4,500.00  
1
Magnetic Ordering
-  
Paramagnetic  
Permeability
0.00 H/m  
11
0.00 H/m  
17
Susceptibility
0.00  
24
0.00  
3
Electrical Properties
  
  
Electrical Property
-  
Poor Conductor  
Resistivity
0.63 nΩ·m  
99+
420.00 nΩ·m  
12
Electrical Conductivity
0.00 106/cm Ω  
99+
0.02 106/cm Ω  
99+
Electron Affinity
50.00 kJ/mol  
26
7.60 kJ/mol  
99+
Thermal
Specific Heat
0.10 J/(kg K)  
99+
0.52 J/(kg K)  
9
Molar Heat Capacity
27.00 J/mol·K  
29
25.06 J/mol·K  
99+
Thermal Conductivity
0.00 W/m·K  
99+
21.90 W/m·K  
99+
Critical Temperature
1,100.00 K  
99+
1,768.00 K  
32
Thermal Expansion
11.60 µm/(m·K)  
99+
8.60 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
380.50 kJ/mol  
26
429.00 kJ/mol  
20
Enthalpy of Fusion
-  
15.48 kJ/mol  
19
Enthalpy of Atomization
410.80 kJ/mol  
25
468.60 kJ/mol  
20
Standard Molar Entropy
37.40 J/mol.K  
99+
27.30 J/mol.K  
99+
Summary >>
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