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Properties of Barium and Strontium

Barium
Strontium
Properties of Strontium & Barium


Physical Properties
Melting Point
725.00 °C   
99+
769.00 °C   
99+
Boiling Point
1,140.00 °C   
99+
1,384.00 °C   
99+
Hardness
  
  
Mohs Hardness
1.25   
19
1.50   
18
Brinell Hardness
Not Available   
Not Available   
Vickers Hardness
Not Available   
Not Available   
Optical Properties
  
  
Refractive Index
Not Available   
Not Available   
Reflectivity
Not Available   
Not Available   
Speed of Sound
1,620.00 m/s   
99+
Not Available   
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   
Sr   
Isotopes
  
  
Known Isotopes
37   
2
27   
12
Electronegativity
  
  
Pauling Electronegativity
0.89   
99+
0.95   
99+
Sanderson Electronegativity
0.68   
28
0.72   
27
Allred Rochow Electronegativity
0.97   
38
0.99   
37
Mulliken-Jaffe Electronegativity
0.88   
22
1.00   
18
Allen Electronegativity
0.88   
99+
0.96   
40
Electropositivity
  
  
Pauling Electropositivity
3.11   
4
3.05   
7
Ionization Energies
  
  
1st Energy Level
502.90 kJ/mol   
99+
549.50 kJ/mol   
99+
2nd Energy Level
965.20 kJ/mol   
99+
1,064.20 kJ/mol   
99+
3rd Energy Level
3,600.00 kJ/mol   
14
4,138.00 kJ/mol   
10
Electrochemical Equivalent
2.56 g/amp-hr   
20
1.64 g/amp-hr   
99+
Electron Work Function
2.70 eV   
99+
2.59 eV   
99+
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   
?
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   
Mechanical Properties
Density
  
  
Density At Room Temperature
3.51 g/cm3   
99+
2.64 g/cm3   
99+
Density When Liquid (at m.p.)
3.34 g/cm3   
99+
2.38 g/cm3   
99+
Vapor Pressure
  
  
Vapor Pressure at 1000 K
7.11 (Pa)   
6
121.00 (Pa)   
1
Vapor Pressure at 2000 K
Not Available   
Not Available   
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Elasticity properties
  
  
Shear Modulus
4.90 GPa   
99+
6.03 GPa   
99+
Bulk Modulus
9.60 GPa   
99+
Not Available   
Young's Modulus
13.00 GPa   
99+
15.70 GPa   
99+
Poisson Ratio
Not Available   
0.28   
17
Other Mechanical Properties
NA   
NA   
Periodic Table
Symbol
Ba   
Sr   
Group Number
2   
16
2   
16
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 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   
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   
?
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   
Atomic Properties
Atomic Number
56   
99+
38   
99+
Atomic Weight
137.33 amu   
99+
87.62 amu   
99+
Atomic Volume
39.24 cm3/mol   
5
33.70 cm3/mol   
6
Electron Configuration
[Xe] 6s2   
[Kr] 5s2   
Valence Electron Potential
21.30 (-eV)   
99+
25.70 (-eV)   
99+
Atom
  
  
Number of Protons
56   
99+
38   
99+
Number of Neutrons
81   
99+
50   
99+
Number of Electrons
56   
99+
38   
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-Strontium.jpg#100   
Radius of an Atom
  
  
Atomic Radius
222.00 pm   
4
215.00 pm   
5
Covalent Radius
215.00 pm   
5
195.00 pm   
15
Van der Waals Radius
268.00 pm   
6
249.00 pm   
7
Lattice Constant
502.80 pm   
15
608.49 pm   
6
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
  
Yttrium
  
Previous Element
Cesium
  
Rubidium
  
Magnetic Properties
Electrical Properties
  
  
Resistivity
332.00 nΩ·m   
13
132.00 nΩ·m   
24
Electrical Conductivity
0.03 106/cm Ω   
40
0.08 106/cm Ω   
26
Electron Affinity
13.95 kJ/mol   
36
5.03 kJ/mol   
38
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   
NA   
Magnetic Characteristics
  
  
Specific Gravity
3.62   
99+
2.64   
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
0.20 J/(kg K)   
30
0.30 J/(kg K)   
18
Thermal Conductivity
18.40 W/m·K   
99+
35.40 W/m·K   
37
Critical Temperature
Not Available   
Not Available   
Molar Heat Capacity
28.07 J/mol·K   
12
26.40 J/mol·K   
28
Thermal Expansion
20.60 µm/(m·K)   
22
22.50 µm/(m·K)   
18
Standard Molar Entropy
62.50 J/mol.K   
20
55.00 J/mol.K   
26
Enthalpy
  
  
Enthalpy of Vaporization
140.00 kJ/mol   
99+
150.00 kJ/mol   
99+
Enthalpy of Fusion
7.66 kJ/mol   
99+
9.16 kJ/mol   
38
Enthalpy of Atomization
175.70 kJ/mol   
99+
163.20 kJ/mol   
99+
All >>
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