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Properties of Manganese and Rhodium

Manganese
Rhodium
Properties of Rhodium & Manganese


Physical Properties
Melting Point
1,245.00 °C   
37
1,966.00 °C   
12
Boiling Point
1,962.00 °C   
99+
3,727.00 °C   
17
Hardness
  
  
Mohs Hardness
6.00   
6
6.00   
6
Brinell Hardness
196.00 MPa   
99+
980.00 MPa   
9
Vickers Hardness
Not Available   
1,100.00 MPa   
9
Optical Properties
  
  
Refractive Index
Not Available   
Not Available   
Reflectivity
Not Available   
84.00 %   
4
Speed of Sound
5,150.00 m/s   
7
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
Mn   
Rh   
Isotopes
  
  
Known Isotopes
21   
18
16   
23
Electronegativity
  
  
Pauling Electronegativity
1.55   
25
2.28   
3
Sanderson Electronegativity
2.20   
7
Not Available   
Allred Rochow Electronegativity
1.60   
9
1.45   
16
Mulliken-Jaffe Electronegativity
Not Available   
Not Available   
Allen Electronegativity
1.75   
15
1.56   
24
Electropositivity
  
  
Pauling Electropositivity
2.45   
29
1.72   
99+
Ionization Energies
  
  
1st Energy Level
717.30 kJ/mol   
30
719.70 kJ/mol   
29
2nd Energy Level
1,509.00 kJ/mol   
39
1,740.00 kJ/mol   
26
3rd Energy Level
3,248.00 kJ/mol   
21
2,997.00 kJ/mol   
27
Electrochemical Equivalent
0.29 g/amp-hr   
99+
1.28 g/amp-hr   
99+
Electron Work Function
4.10 eV   
25
4.98 eV   
6
Other Chemical Properties
?
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   
?
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
7.21 g/cm3   
99+
12.41 g/cm3   
28
Density When Liquid (at m.p.)
5.95 g/cm3   
99+
10.70 g/cm3   
14
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)   
12
Not Available   
Vapor Pressure at 2000 K
Not Available   
0.02 (Pa)   
19
Tensile Strength
Not Available   
951.00 MPa   
5
Viscosity
Not Available   
Not Available   
Elasticity properties
  
  
Shear Modulus
Not Available   
150.00 GPa   
6
Bulk Modulus
120.00 GPa   
14
275.00 GPa   
5
Young's Modulus
198.00 GPa   
12
380.00 GPa   
5
Poisson Ratio
Not Available   
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
Mn   
Rh   
Group Number
7   
11
9   
9
Period Number
4   
5   
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 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
?
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   
?
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
25   
99+
45   
99+
Atomic Weight
54.94 amu   
99+
102.91 amu   
99+
Atomic Volume
1.39 cm3/mol   
99+
8.30 cm3/mol   
99+
Electron Configuration
[Ar] 3d5 4s2   
[Kr] 4d8 5s1   
Valence Electron Potential
220.00 (-eV)   
2
64.00 (-eV)   
22
Atom
  
  
Number of Protons
25   
99+
45   
99+
Number of Neutrons
30   
99+
58   
99+
Number of Electrons
25   
99+
45   
99+
Crystal Structure
?
BCC is a basis type of cubic crystal structure. In crystallography, the cubic crystals structure is a crystal system where the unit cell has a cube shaped structure. This is one of the simplest crystal structure found in crystals of metal.Body Centered Cubic (BCC)   
?
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
BCC-Crystal-Structure-.jpg#100   
FCC-Crystal-Structure-of-Rhodium.jpg#100   
Radius of an Atom
  
  
Atomic Radius
127.00 pm   
99+
134.00 pm   
99+
Covalent Radius
139.00 pm   
99+
142.00 pm   
99+
Van der Waals Radius
200.00 pm   
28
200.00 pm   
28
Lattice Constant
891.25 pm   
1
380.34 pm   
27
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
Adjacent Atomic Numbers
  
  
Next Element
Iron
  
Palladium
  
Previous Element
Chromium
  
Ruthenium
  
Magnetic Properties
Electrical Properties
  
  
Resistivity
1.44 nΩ·m   
99+
43.30 nΩ·m   
99+
Electrical Conductivity
0.01 106/cm Ω   
99+
0.21 106/cm Ω   
8
Electron Affinity
0.00 kJ/mol   
40
109.70 kJ/mol   
7
Electrical Property
?
Conductor metals have very low resistance to electric currents. They can easily conduct electric current through them.Conductor   
?
Conductor metals have very low resistance to electric currents. They can easily conduct electric current through them.Conductor   
Magnetic Characteristics
  
  
Specific Gravity
7.21   
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
0.48 J/(kg K)   
11
0.24 J/(kg K)   
22
Thermal Conductivity
7.81 W/m·K   
99+
150.00 W/m·K   
9
Critical Temperature
Not Available   
Not Available   
Molar Heat Capacity
26.32 J/mol·K   
29
24.98 J/mol·K   
99+
Thermal Expansion
21.70 µm/(m·K)   
21
8.20 µm/(m·K)   
99+
Standard Molar Entropy
32.00 J/mol.K   
99+
31.50 J/mol.K   
99+
Enthalpy
  
  
Enthalpy of Vaporization
219.70 kJ/mol   
99+
495.40 kJ/mol   
12
Enthalpy of Fusion
14.64 kJ/mol   
23
21.76 kJ/mol   
10
Enthalpy of Atomization
280.30 kJ/mol   
38
556.50 kJ/mol   
12
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