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Properties of Neodymium and Rhodium

Neodymium
Rhodium
Properties of Rhodium & Neodymium


Physical Properties
Melting Point
1,010.00 °C   
99+
1,966.00 °C   
12
Boiling Point
3,127.00 °C   
28
3,727.00 °C   
17
Hardness
  
  
Mohs Hardness
Not Available   
6.00   
6
Brinell Hardness
265.00 MPa   
35
980.00 MPa   
9
Vickers Hardness
345.00 MPa   
27
1,100.00 MPa   
9
Optical Properties
  
  
Refractive Index
Not Available   
Not Available   
Reflectivity
Not Available   
84.00 %   
4
Speed of Sound
2,330.00 m/s   
38
4,700.00 m/s   
15
Allotropes
No   
No   
α Allotropes
Not Available   
Not Available   
β Allotropes
Not Available   
Not Available   
γ Allotropes
Not Available   
Not Available   
Chemical Properties
Chemical Formula
Nd   
Rh   
Isotopes
  
  
Known Isotopes
30   
9
16   
23
Electronegativity
  
  
Pauling Electronegativity
1.14   
99+
2.28   
3
Sanderson Electronegativity
Not Available   
Not Available   
Allred Rochow Electronegativity
1.07   
32
1.45   
16
Mulliken-Jaffe Electronegativity
Not Available   
Not Available   
Allen Electronegativity
Not Available   
1.56   
24
Electropositivity
  
  
Pauling Electropositivity
2.86   
13
1.72   
99+
Ionization Energies
  
  
1st Energy Level
533.10 kJ/mol   
99+
719.70 kJ/mol   
29
2nd Energy Level
1,040.00 kJ/mol   
99+
1,740.00 kJ/mol   
26
3rd Energy Level
2,130.00 kJ/mol   
99+
2,997.00 kJ/mol   
27
Electrochemical Equivalent
1.79 g/amp-hr   
37
1.28 g/amp-hr   
99+
Electron Work Function
3.20 eV   
34
4.98 eV   
6
Other Chemical Properties
?
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   
?
Anti-corrosion metals have the protection on their surfaces which protect them from corroding in corrosive environments.Anti Corrosion, 
?
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, 
?
Radioactive metals emit particles and radiation from their nuclei. This process comes in the picture because their nuclei experience the intense conflict between two strong forces. This metal also have radioactive isotopes.Radioactive Isotopes   
Mechanical Properties
Density
  
  
Density At Room Temperature
7.01 g/cm3   
99+
12.41 g/cm3   
28
Density When Liquid (at m.p.)
6.89 g/cm3   
36
10.70 g/cm3   
14
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)   
21
Not Available   
Vapor Pressure at 2000 K
101.00 (Pa)   
2
0.02 (Pa)   
19
Tensile Strength
Not Available   
951.00 MPa   
5
Viscosity
Not Available   
Not Available   
Elasticity properties
  
  
Shear Modulus
16.30 GPa   
38
150.00 GPa   
6
Bulk Modulus
31.80 GPa   
37
275.00 GPa   
5
Young's Modulus
41.40 GPa   
40
380.00 GPa   
5
Poisson Ratio
0.28   
16
0.26   
22
Other Mechanical Properties
NA   
?
Malleability of metals defines their ability to deform under compressive stress; this is often characterized by the metals ability to form a thin sheet by hammering or rolling.Malleable   
Periodic Table
Symbol
Nd   
Rh   
Group Number
1   
17
9   
9
Period Number
6   
5   
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   
?
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   
Element Family
?
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   
?
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   
Atomic Properties
Atomic Number
60   
99+
45   
99+
Atomic Weight
144.24 amu   
99+
102.91 amu   
99+
Atomic Volume
20.60 cm3/mol   
18
8.30 cm3/mol   
99+
Electron Configuration
[Xe] 4f4 6s2   
[Kr] 4d8 5s1   
Valence Electron Potential
43.40 (-eV)   
99+
64.00 (-eV)   
22
Atom
  
  
Number of Protons
60   
99+
45   
99+
Number of Neutrons
84   
40
58   
99+
Number of Electrons
60   
99+
45   
99+
Crystal Structure
?
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)   
?
In crystallography, the cubic (or isometric) crystal system is a crystal system where the unit cell is in the shape of a cube. This is one of the most common and simplest shapes found in crystals and minerals.Face Centered Cubic (FCC)   
Crystal Lattice
DHCP-Crystal-Structure-of-Neodymium.jpg#100   
FCC-Crystal-Structure-of-Rhodium.jpg#100   
Radius of an Atom
  
  
Atomic Radius
181.00 pm   
13
134.00 pm   
99+
Covalent Radius
201.00 pm   
10
142.00 pm   
99+
Van der Waals Radius
229.00 pm   
20
200.00 pm   
28
Lattice Constant
365.80 pm   
30
380.34 pm   
27
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   
Lattice C/A Ratio
1.61   
4
Not Available   
Adjacent Atomic Numbers
  
  
Next Element
Promethium
  
Palladium
  
Previous Element
Praseodymium
  
Ruthenium
  
Magnetic Properties
Electrical Properties
  
  
Resistivity
643.00 nΩ·m   
6
43.30 nΩ·m   
99+
Electrical Conductivity
0.02 106/cm Ω   
99+
0.21 106/cm Ω   
8
Electron Affinity
50.00 kJ/mol   
21
109.70 kJ/mol   
7
Electrical Property
NA   
?
Conductor metals have very low resistance to electric currents. They can easily conduct electric current through them.Conductor   
Magnetic Characteristics
  
  
Specific Gravity
7.00   
99+
12.41   
20
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
0.19 J/(kg K)   
32
0.24 J/(kg K)   
22
Thermal Conductivity
16.50 W/m·K   
99+
150.00 W/m·K   
9
Critical Temperature
Not Available   
Not Available   
Molar Heat Capacity
27.45 J/mol·K   
17
24.98 J/mol·K   
99+
Thermal Expansion
9.60 µm/(m·K)   
99+
8.20 µm/(m·K)   
99+
Standard Molar Entropy
71.50 J/mol.K   
13
31.50 J/mol.K   
99+
Enthalpy
  
  
Enthalpy of Vaporization
273.00 kJ/mol   
34
495.40 kJ/mol   
12
Enthalpy of Fusion
7.14 kJ/mol   
99+
21.76 kJ/mol   
10
Enthalpy of Atomization
322.00 kJ/mol   
32
556.50 kJ/mol   
12
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