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Properties of Cobalt and Neodymium

Cobalt
Neodymium
Properties of Neodymium & Cobalt


Physical Properties
Melting Point
1,495.00 °C   
29
1,010.00 °C   
99+
Boiling Point
2,870.00 °C   
34
3,127.00 °C   
28
Hardness
  
  
Mohs Hardness
5.00   
8
Not Available   
Brinell Hardness
470.00 MPa   
26
265.00 MPa   
35
Vickers Hardness
1,043.00 MPa   
11
345.00 MPa   
27
Optical Properties
  
  
Refractive Index
Not Available   
Not Available   
Reflectivity
67.00 %   
11
Not Available   
Speed of Sound
4,720.00 m/s   
14
2,330.00 m/s   
38
Allotropes
Yes   
No   
α Allotropes
?
It forms above 417 °C simple cubic (metallic)Α-Cobalt   
Not Available   
β Allotropes
?
It forms below 417 °C hexagonal close packed (hcp) (metallic)Β-Cobalt   
Not Available   
γ Allotropes
Not Available   
Not Available   
Chemical Properties
Chemical Formula
Co   
Nd   
Isotopes
  
  
Known Isotopes
26   
13
30   
9
Electronegativity
  
  
Pauling Electronegativity
1.88   
12
1.14   
99+
Sanderson Electronegativity
2.56   
1
Not Available   
Allred Rochow Electronegativity
1.70   
5
1.07   
32
Mulliken-Jaffe Electronegativity
Not Available   
Not Available   
Allen Electronegativity
1.84   
10
Not Available   
Electropositivity
  
  
Pauling Electropositivity
2.12   
99+
2.86   
13
Ionization Energies
  
  
1st Energy Level
760.40 kJ/mol   
19
533.10 kJ/mol   
99+
2nd Energy Level
1,648.00 kJ/mol   
31
1,040.00 kJ/mol   
99+
3rd Energy Level
3,232.00 kJ/mol   
22
2,130.00 kJ/mol   
99+
Electrochemical Equivalent
1.10 g/amp-hr   
99+
1.79 g/amp-hr   
37
Electron Work Function
5.00 eV   
5
3.20 eV   
34
Other Chemical Properties
?
Stable metals are non radioactive metals and have zero valence electrons in the outer shell.Chemical Stability, 
?
Ionization is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons to form ions, often in conjunction with other chemical changes.Ionization   
?
Stable metals are non radioactive metals and have zero valence electrons in the outer shell.Chemical Stability, 
?
Corrosion is a process which converts refined metals to their more stable forms, for example, its oxide and hydroxide. This process of metals getting corroded is a gradual destruction of metals by chemical reactions.Corrosion, 
?
Flammable metals have ability to burn or ignite, causing fire or combustion.Flammable, 
?
Ionization is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons to form ions, often in conjunction with other chemical changes.Ionization   
Mechanical Properties
Density
  
  
Density At Room Temperature
4.51 g/cm3   
99+
7.01 g/cm3   
99+
Density When Liquid (at m.p.)
4.11 g/cm3   
99+
6.89 g/cm3   
36
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available   
0.00 (Pa)   
21
Vapor Pressure at 2000 K
0.98 (Pa)   
14
101.00 (Pa)   
2
Tensile Strength
434.00 MPa   
9
Not Available   
Viscosity
Not Available   
Not Available   
Elasticity properties
  
  
Shear Modulus
44.00 GPa   
17
16.30 GPa   
38
Bulk Modulus
110.00 GPa   
15
31.80 GPa   
37
Young's Modulus
116.00 GPa   
18
41.40 GPa   
40
Poisson Ratio
0.32   
12
0.28   
16
Other Mechanical Properties
?
Ductility of metals defines their ability to deform under tensile stress; this is often characterized by the metals ability to be stretched into a wire.Ductile   
NA   
Periodic Table
Symbol
Co   
Nd   
Group Number
9   
9
1   
17
Period Number
4   
6   
Block
?
The d-block is on the middle of the periodic table and includes elements from columns 3 through 12. These elements are also known as the transition metals because they show a transitivity in their properties i.e. they show a trend in their properties.d block   
?
The f-block is in the center-left of a 32-column periodic table but in the footnoted appendage of 18-column tables. These elements are not generally considered as part of any group. They are often called inner transition metals.f block   
Element Family
?
What is Transition Metal? All transition metals are placed under the d-block from group number 3 to 12. Transition metals show characteristics like malleability, ductility and are good conductor of electricity.Transition Metal   
?
Total 15 metals are included in Lanthanide series from Lanthanum to Lutetium. Lanthanide series is located under f and d block of the periodic table.Lanthanide   
Atomic Properties
Atomic Number
22   
99+
60   
99+
Atomic Weight
47.87 amu   
99+
144.24 amu   
99+
Atomic Volume
10.64 cm3/mol   
99+
20.60 cm3/mol   
18
Electron Configuration
[Ar] 3d2 4s2   
[Xe] 4f4 6s2   
Valence Electron Potential
95.20 (-eV)   
10
43.40 (-eV)   
99+
Atom
  
  
Number of Protons
22   
99+
60   
99+
Number of Neutrons
26   
99+
84   
40
Number of Electrons
22   
99+
60   
99+
Crystal Structure
?
The hexagonal crystal system consists of the 7 point groups such that all their space groups have the hexagonal lattice as underlying lattice. The hexagonal crystal family consists of the 12 point groups such that at least one of their space groups has theHexagonal Close Packed (HCP)   
?
In crystallography, the hexagonal crystal structure and its double hexagonal crystal structure is one of the 7 crystal structure, The hexagonal lattice system consists of just one Bravais lattice type: the hexagonal shape.Double Hexagonal Close Packed (DHCP)   
Crystal Lattice
HCP-Crystal-Structure-of-Cobalt.jpg#100   
DHCP-Crystal-Structure-of-Neodymium.jpg#100   
Radius of an Atom
  
  
Atomic Radius
147.00 pm   
34
181.00 pm   
13
Covalent Radius
160.00 pm   
30
201.00 pm   
10
Van der Waals Radius
200.00 pm   
28
229.00 pm   
20
Lattice Constant
295.08 pm   
99+
365.80 pm   
30
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
1.61   
4
Adjacent Atomic Numbers
  
  
Next Element
Nickel
  
Promethium
  
Previous Element
Iron
  
Praseodymium
  
Magnetic Properties
Electrical Properties
  
  
Resistivity
420.00 nΩ·m   
12
643.00 nΩ·m   
6
Electrical Conductivity
0.02 106/cm Ω   
99+
0.02 106/cm Ω   
99+
Electron Affinity
7.60 kJ/mol   
37
50.00 kJ/mol   
21
Electrical Property
?
Poor conductor metals have moderate resistance to electric currents. They can conduct electric current through them with very low efficiency.Poor Conductor   
NA   
Magnetic Characteristics
  
  
Specific Gravity
4,500.00   
1
7.00   
99+
Magnetic Ordering
?
Paramagnetic metals are slightly attracted by magnet, but they can’t retain the magnetic effect once they are removed from the magnetic field.Paramagnetic   
?
Paramagnetic metals are slightly attracted by magnet, but they can’t retain the magnetic effect once they are removed from the magnetic field.Paramagnetic   
Permeability
Not Available   
Not Available   
Susceptibility
Not Available   
Not Available   
Thermal Properties
Specific Heat
0.52 J/(kg K)   
9
0.19 J/(kg K)   
32
Thermal Conductivity
21.90 W/m·K   
99+
16.50 W/m·K   
99+
Critical Temperature
Not Available   
Not Available   
Molar Heat Capacity
25.06 J/mol·K   
99+
27.45 J/mol·K   
17
Thermal Expansion
8.60 µm/(m·K)   
99+
9.60 µm/(m·K)   
99+
Standard Molar Entropy
27.30 J/mol.K   
99+
71.50 J/mol.K   
13
Enthalpy
  
  
Enthalpy of Vaporization
429.00 kJ/mol   
15
273.00 kJ/mol   
34
Enthalpy of Fusion
15.48 kJ/mol   
19
7.14 kJ/mol   
99+
Enthalpy of Atomization
468.60 kJ/mol   
15
322.00 kJ/mol   
32
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