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Properties of Strontium and Lead

Strontium
Lead
Properties of Lead & Strontium


Physical Properties
Melting Point
769.00 °C   
99+
327.50 °C   
99+
Boiling Point
1,384.00 °C   
99+
1,740.00 °C   
99+
Hardness
  
  
Mohs Hardness
1.50   
18
1.50   
18
Brinell Hardness
Not Available   
38.00 MPa   
99+
Vickers Hardness
Not Available   
Not Available   
Optical Properties
  
  
Refractive Index
Not Available   
Not Available   
Reflectivity
Not Available   
Not Available   
Speed of Sound
Not Available   
1,190.00 m/s   
99+
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
Sr   
Pb   
Isotopes
  
  
Known Isotopes
27   
12
35   
4
Electronegativity
  
  
Pauling Electronegativity
0.95   
99+
1.87   
13
Sanderson Electronegativity
0.72   
27
2.29   
4
Allred Rochow Electronegativity
0.99   
37
1.55   
11
Mulliken-Jaffe Electronegativity
1.00   
18
2.41   
2
Allen Electronegativity
0.96   
40
1.85   
8
Electropositivity
  
  
Pauling Electropositivity
3.05   
7
1.67   
99+
Ionization Energies
  
  
1st Energy Level
549.50 kJ/mol   
99+
715.60 kJ/mol   
31
2nd Energy Level
1,064.20 kJ/mol   
99+
1,450.50 kJ/mol   
99+
3rd Energy Level
4,138.00 kJ/mol   
10
3,081.50 kJ/mol   
23
Electrochemical Equivalent
1.64 g/amp-hr   
99+
3.87 g/amp-hr   
9
Electron Work Function
2.59 eV   
99+
4.25 eV   
21
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
2.64 g/cm3   
99+
11.34 g/cm3   
33
Density When Liquid (at m.p.)
2.38 g/cm3   
99+
10.66 g/cm3   
15
Vapor Pressure
  
  
Vapor Pressure at 1000 K
121.00 (Pa)   
1
1.64 (Pa)   
7
Vapor Pressure at 2000 K
Not Available   
Not Available   
Tensile Strength
Not Available   
12.00 MPa   
20
Viscosity
Not Available   
Not Available   
Elasticity properties
  
  
Shear Modulus
6.03 GPa   
99+
5.60 GPa   
99+
Bulk Modulus
Not Available   
46.00 GPa   
24
Young's Modulus
15.70 GPa   
99+
16.00 GPa   
99+
Poisson Ratio
0.28   
17
0.44   
3
Other Mechanical Properties
NA   
?
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, 
?
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
Sr   
Pb   
Group Number
2   
16
14   
4
Period Number
5   
6   
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 p-block is on the right side of the periodic table and includes elements from the six columns beginning with column 13 and ending with column 18. Helium, though being in the top of group 18, is not included in the p-block.p 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 post transition metals are placed in group number 13, 14 and 15 of periodic table. In fact, they are located between Transition Metals and Metalloids. Post transition metals have very poor mechanical properties.Post-​Transition   
Atomic Properties
Atomic Number
38   
99+
82   
34
Atomic Weight
87.62 amu   
99+
207.20 amu   
30
Atomic Volume
33.70 cm3/mol   
6
18.17 cm3/mol   
27
Electron Configuration
[Kr] 5s2   
[Xe] 4f14 5d10 6s2 6p2   
Valence Electron Potential
25.70 (-eV)   
99+
24.20 (-eV)   
99+
Atom
  
  
Number of Protons
38   
99+
82   
34
Number of Neutrons
50   
99+
125   
19
Number of Electrons
38   
99+
82   
34
Crystal Structure
?
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)   
?
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
FCC-Crystal-Structure-of-Strontium.jpg#100   
FCC-Crystal-Structure-of-Lead.jpg#100   
Radius of an Atom
  
  
Atomic Radius
215.00 pm   
5
175.00 pm   
19
Covalent Radius
195.00 pm   
15
146.00 pm   
38
Van der Waals Radius
249.00 pm   
7
202.00 pm   
27
Lattice Constant
608.49 pm   
6
495.08 pm   
16
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
Yttrium
  
Bismuth
  
Previous Element
Rubidium
  
Thallium
  
Magnetic Properties
Electrical Properties
  
  
Resistivity
132.00 nΩ·m   
24
208.00 nΩ·m   
16
Electrical Conductivity
0.08 106/cm Ω   
26
0.05 106/cm Ω   
36
Electron Affinity
5.03 kJ/mol   
38
35.10 kJ/mol   
28
Electrical Property
NA   
?
Poor conductor metals have moderate resistance to electric currents. They can conduct electric current through them with very low efficiency.Poor Conductor   
Magnetic Characteristics
  
  
Specific Gravity
2.64   
99+
11.35   
25
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   
?
Diamagnetic metals produce a magnetic field opposite to the applied magnetic field. Thus, they are repelled by magnets and show magnetic nature.Diamagnetic   
Permeability
Not Available   
Not Available   
Susceptibility
Not Available   
Not Available   
Thermal Properties
Specific Heat
0.30 J/(kg K)   
18
0.13 J/(kg K)   
39
Thermal Conductivity
35.40 W/m·K   
37
35.30 W/m·K   
38
Critical Temperature
Not Available   
Not Available   
Molar Heat Capacity
26.40 J/mol·K   
28
26.65 J/mol·K   
26
Thermal Expansion
22.50 µm/(m·K)   
18
28.90 µm/(m·K)   
13
Standard Molar Entropy
55.00 J/mol.K   
26
64.80 J/mol.K   
17
Enthalpy
  
  
Enthalpy of Vaporization
150.00 kJ/mol   
99+
179.40 kJ/mol   
99+
Enthalpy of Fusion
9.16 kJ/mol   
38
4.77 kJ/mol   
99+
Enthalpy of Atomization
163.20 kJ/mol   
99+
194.60 kJ/mol   
99+
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