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Properties of Polonium and Radium

Polonium
Radium
Properties of Radium & Polonium


Physical Properties
Melting Point
254.00 °C   
99+
700.00 °C   
99+
Boiling Point
962.00 °C   
99+
1,737.00 °C   
99+
Hardness
  
  
Mohs Hardness
Not Available   
Not Available   
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
Not Available   
Not Available   
Allotropes
Yes   
No   
α Allotropes
?
simple cubic (metallic)Α-Polonium   
Not Available   
β Allotropes
?
rhombohedral (metallic)Β-Polonium   
Not Available   
γ Allotropes
Not Available   
Not Available   
Chemical Properties
Chemical Formula
Po   
Ra   
Isotopes
  
  
Known Isotopes
29   
10
33   
6
Electronegativity
  
  
Pauling Electronegativity
2.00   
7
0.90   
99+
Sanderson Electronegativity
Not Available   
Not Available   
Allred Rochow Electronegativity
1.76   
2
0.97   
38
Mulliken-Jaffe Electronegativity
2.48   
1
0.92   
20
Allen Electronegativity
2.19   
2
0.89   
99+
Electropositivity
  
  
Pauling Electropositivity
2.00   
99+
3.10   
5
Ionization Energies
  
  
1st Energy Level
812.10 kJ/mol   
14
509.30 kJ/mol   
99+
2nd Energy Level
Not Available   
979.00 kJ/mol   
99+
3rd Energy Level
Not Available   
Not Available   
Electrochemical Equivalent
3.90 g/amp-hr   
8
4.22 g/amp-hr   
6
Electron Work Function
Not Available   
Not Available   
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, 
?
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   
Mechanical Properties
Density
  
  
Density At Room Temperature
9.20 g/cm3   
99+
5.50 g/cm3   
99+
Density When Liquid (at m.p.)
9.40 g/cm3   
19
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available   
Not Available   
Vapor Pressure at 2000 K
Not Available   
Not Available   
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Elasticity properties
  
  
Shear Modulus
Not Available   
Not Available   
Bulk Modulus
Not Available   
Not Available   
Young's Modulus
Not Available   
Not Available   
Poisson Ratio
Not Available   
Not Available   
Other Mechanical Properties
NA   
NA   
Periodic Table
Symbol
Po   
Ra   
Group Number
16   
2
2   
16
Period Number
6   
7   
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   
?
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 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   
?
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
84   
32
88   
30
Atomic Weight
209.00 amu   
28
226.00 amu   
26
Atomic Volume
22.23 cm3/mol   
13
45.20 cm3/mol   
4
Electron Configuration
[Xe] 4f14 5d10 6s2 6p4   
[Rn] 7s2   
Valence Electron Potential
Not Available   
20.10 (-eV)   
99+
Atom
  
  
Number of Protons
84   
32
88   
30
Number of Neutrons
125   
19
138   
16
Number of Electrons
84   
32
88   
30
Crystal Structure
?
The mono-clinic crystal structure is one of the seven lattice point groups. Here vectors of crystal have unequal lengths. Here vectors of crystal have unequal lengths and have two vectors perpendicular to the 3rd oneMonoclinic (MON)   
?
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)   
Crystal Lattice
MON-Crystal-Structure-of-Polonium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Radius of an Atom
  
  
Atomic Radius
168.00 pm   
23
Not Available   
Covalent Radius
140.00 pm   
99+
221.00 pm   
3
Van der Waals Radius
197.00 pm   
29
283.00 pm   
4
Lattice Constant
335.90 pm   
99+
514.80 pm   
13
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
Francium
  
Actinium
  
Previous Element
Bismuth
  
Francium
  
Magnetic Properties
Electrical Properties
  
  
Resistivity
0.40 nΩ·m   
99+
100.00 nΩ·m   
31
Electrical Conductivity
0.02 106/cm Ω   
99+
Not Available   
Electron Affinity
183.30 kJ/mol   
3
Not Available   
Electrical Property
?
Conductor metals have very low resistance to electric currents. They can easily conduct electric current through them.Conductor   
NA   
Magnetic Characteristics
  
  
Specific Gravity
9.32   
31
5.00   
99+
Magnetic Ordering
?
Nonmagnetic metals are non magnetic in nature and do not show or exhibit any magnetic properties.Nonmagnetic   
?
Nonmagnetic metals are non magnetic in nature and do not show or exhibit any magnetic properties.Nonmagnetic   
Permeability
Not Available   
Not Available   
Susceptibility
Not Available   
Not Available   
Thermal Properties
Specific Heat
0.12 J/(kg K)   
40
0.12 J/(kg K)   
40
Thermal Conductivity
20.00 W/m·K   
99+
18.60 W/m·K   
99+
Critical Temperature
Not Available   
Not Available   
Molar Heat Capacity
26.40 J/mol·K   
28
Not Available   
Thermal Expansion
23.50 µm/(m·K)   
16
Not Available   
Standard Molar Entropy
Not Available   
71.00 J/mol.K   
14
Enthalpy
  
  
Enthalpy of Vaporization
60.30 kJ/mol   
99+
Not Available   
Enthalpy of Fusion
13.00 kJ/mol   
26
Not Available   
Enthalpy of Atomization
134.00 kJ/mol   
99+
163.00 kJ/mol   
99+
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