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Properties of Barium and Rhodium

Barium
Rhodium
Properties of Rhodium & Barium


Physical Properties
Melting Point
725.00 °C   
99+
1,966.00 °C   
12
Boiling Point
1,140.00 °C   
99+
3,727.00 °C   
17
Hardness
  
  
Mohs Hardness
1.25   
19
6.00   
6
Brinell Hardness
Not Available   
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
1,620.00 m/s   
99+
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
Ba   
Rh   
Isotopes
  
  
Known Isotopes
37   
2
16   
23
Electronegativity
  
  
Pauling Electronegativity
0.89   
99+
2.28   
3
Sanderson Electronegativity
0.68   
28
Not Available   
Allred Rochow Electronegativity
0.97   
38
1.45   
16
Mulliken-Jaffe Electronegativity
0.88   
22
Not Available   
Allen Electronegativity
0.88   
99+
1.56   
24
Electropositivity
  
  
Pauling Electropositivity
3.11   
4
1.72   
99+
Ionization Energies
  
  
1st Energy Level
502.90 kJ/mol   
99+
719.70 kJ/mol   
29
2nd Energy Level
965.20 kJ/mol   
99+
1,740.00 kJ/mol   
26
3rd Energy Level
3,600.00 kJ/mol   
14
2,997.00 kJ/mol   
27
Electrochemical Equivalent
2.56 g/amp-hr   
20
1.28 g/amp-hr   
99+
Electron Work Function
2.70 eV   
99+
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, 
?
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.Radioactivity, 
?
Solubility is a chemical property referring to the ability for a given substance, the solute, to dissolve in a solvent.Solubility   
?
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
3.51 g/cm3   
99+
12.41 g/cm3   
28
Density When Liquid (at m.p.)
3.34 g/cm3   
99+
10.70 g/cm3   
14
Vapor Pressure
  
  
Vapor Pressure at 1000 K
7.11 (Pa)   
6
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
4.90 GPa   
99+
150.00 GPa   
6
Bulk Modulus
9.60 GPa   
99+
275.00 GPa   
5
Young's Modulus
13.00 GPa   
99+
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
Ba   
Rh   
Group Number
2   
16
9   
9
Period Number
6   
5   
Block
?
The s-block is on the left side of the periodic table that includes elements from the first two columns, the alkali metals (group 1) and alkaline earth metals (group 2), plus helium.s 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
?
All alkaline earth metals are placed under group number 2 and s-block of periodic table. These metals are somewhat reactive at standard conditions. Alkaline earth metals appear shiny, silvery-white and are found in the earth’s crust.Alkaline Earth   
?
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
56   
99+
45   
99+
Atomic Weight
137.33 amu   
99+
102.91 amu   
99+
Atomic Volume
39.24 cm3/mol   
5
8.30 cm3/mol   
99+
Electron Configuration
[Xe] 6s2   
[Kr] 4d8 5s1   
Valence Electron Potential
21.30 (-eV)   
99+
64.00 (-eV)   
22
Atom
  
  
Number of Protons
56   
99+
45   
99+
Number of Neutrons
81   
99+
58   
99+
Number of Electrons
56   
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
222.00 pm   
4
134.00 pm   
99+
Covalent Radius
215.00 pm   
5
142.00 pm   
99+
Van der Waals Radius
268.00 pm   
6
200.00 pm   
28
Lattice Constant
502.80 pm   
15
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
Lanthanum
  
Palladium
  
Previous Element
Cesium
  
Ruthenium
  
Magnetic Properties
Electrical Properties
  
  
Resistivity
332.00 nΩ·m   
13
43.30 nΩ·m   
99+
Electrical Conductivity
0.03 106/cm Ω   
40
0.21 106/cm Ω   
8
Electron Affinity
13.95 kJ/mol   
36
109.70 kJ/mol   
7
Electrical Property
?
Under certain conditions, superconductor metals offer zero resistance to electric current it means this type of metals will conduct electricity without any resistance.Superconductor   
?
Conductor metals have very low resistance to electric currents. They can easily conduct electric current through them.Conductor   
Magnetic Characteristics
  
  
Specific Gravity
3.62   
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
0.20 J/(kg K)   
30
0.24 J/(kg K)   
22
Thermal Conductivity
18.40 W/m·K   
99+
150.00 W/m·K   
9
Critical Temperature
Not Available   
Not Available   
Molar Heat Capacity
28.07 J/mol·K   
12
24.98 J/mol·K   
99+
Thermal Expansion
20.60 µm/(m·K)   
22
8.20 µm/(m·K)   
99+
Standard Molar Entropy
62.50 J/mol.K   
20
31.50 J/mol.K   
99+
Enthalpy
  
  
Enthalpy of Vaporization
140.00 kJ/mol   
99+
495.40 kJ/mol   
12
Enthalpy of Fusion
7.66 kJ/mol   
99+
21.76 kJ/mol   
10
Enthalpy of Atomization
175.70 kJ/mol   
99+
556.50 kJ/mol   
12
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