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Properties of Platinum and Polonium

Platinum
Polonium
Properties of Polonium & Platinum


Physical Properties
Melting Point
1,772.00 °C   
16
254.00 °C   
99+
Boiling Point
3,827.00 °C   
15
962.00 °C   
99+
Hardness
  
  
Mohs Hardness
3.50   
11
Not Available   
Brinell Hardness
300.00 MPa   
34
Not Available   
Vickers Hardness
400.00 MPa   
25
Not Available   
Optical Properties
  
  
Refractive Index
Not Available   
Not Available   
Reflectivity
73.00 %   
8
Not Available   
Speed of Sound
2,800.00 m/s   
29
Not Available   
Allotropes
No   
Yes   
α Allotropes
Not Available   
?
simple cubic (metallic)Α-Polonium   
β Allotropes
Not Available   
?
rhombohedral (metallic)Β-Polonium   
γ Allotropes
Not Available   
Not Available   
Chemical Properties
Chemical Formula
Pt   
Po   
Isotopes
  
  
Known Isotopes
35   
4
29   
10
Electronegativity
  
  
Pauling Electronegativity
2.28   
3
2.00   
7
Sanderson Electronegativity
Not Available   
Not Available   
Allred Rochow Electronegativity
1.44   
17
1.76   
2
Mulliken-Jaffe Electronegativity
Not Available   
2.48   
1
Allen Electronegativity
1.72   
16
2.19   
2
Electropositivity
  
  
Pauling Electropositivity
1.72   
99+
2.00   
99+
Ionization Energies
  
  
1st Energy Level
870.00 kJ/mol   
10
812.10 kJ/mol   
14
2nd Energy Level
1,791.00 kJ/mol   
21
Not Available   
3rd Energy Level
Not Available   
Not Available   
Electrochemical Equivalent
1.82 g/amp-hr   
35
3.90 g/amp-hr   
8
Electron Work Function
5.65 eV   
1
Not Available   
Other Chemical Properties
?
Stable metals are non radioactive metals and have zero valence electrons in the outer shell.Chemical Stability, 
?
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   
?
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   
Mechanical Properties
Density
  
  
Density At Room Temperature
21.45 g/cm3   
11
9.20 g/cm3   
99+
Density When Liquid (at m.p.)
19.77 g/cm3   
2
9.40 g/cm3   
19
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available   
Not Available   
Vapor Pressure at 2000 K
0.07 (Pa)   
18
Not Available   
Tensile Strength
125.00 MPa   
14
Not Available   
Viscosity
Not Available   
Not Available   
Elasticity properties
  
  
Shear Modulus
61.00 GPa   
14
Not Available   
Bulk Modulus
230.00 GPa   
6
Not Available   
Young's Modulus
168.00 GPa   
14
Not Available   
Poisson Ratio
0.38   
6
Not Available   
Other Mechanical Properties
?
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   
NA   
Periodic Table
Symbol
Pt   
Po   
Group Number
10   
8
16   
2
Period Number
6   
6   
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 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
?
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   
?
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
78   
38
84   
32
Atomic Weight
47.87 amu   
99+
209.00 amu   
28
Atomic Volume
9.09 cm3/mol   
99+
22.23 cm3/mol   
13
Electron Configuration
[Xe] 4f14 5d9 6s1   
[Xe] 4f14 5d10 6s2 6p4   
Valence Electron Potential
392.42 (-eV)   
1
Not Available   
Atom
  
  
Number of Protons
78   
38
84   
32
Number of Neutrons
117   
24
125   
19
Number of Electrons
78   
38
84   
32
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)   
?
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)   
Crystal Lattice
FCC-Crystal-Structure-of-Platinum.jpg#100   
MON-Crystal-Structure-of-Polonium.jpg#100   
Radius of an Atom
  
  
Atomic Radius
139.00 pm   
39
168.00 pm   
23
Covalent Radius
136.00 pm   
99+
140.00 pm   
99+
Van der Waals Radius
175.00 pm   
36
197.00 pm   
29
Lattice Constant
392.42 pm   
24
335.90 pm   
99+
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
Gold
  
Francium
  
Previous Element
Iridium
  
Bismuth
  
Magnetic Properties
Electrical Properties
  
  
Resistivity
105.00 nΩ·m   
30
0.40 nΩ·m   
99+
Electrical Conductivity
0.10 106/cm Ω   
21
0.02 106/cm Ω   
99+
Electron Affinity
205.30 kJ/mol   
2
183.30 kJ/mol   
3
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
21.45   
4
9.32   
31
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   
?
Nonmagnetic metals are non magnetic in nature and do not show or exhibit any magnetic properties.Nonmagnetic   
Permeability
0.00 H/m   
3
Not Available   
Susceptibility
Not Available   
Not Available   
Thermal Properties
Specific Heat
0.13 J/(kg K)   
39
0.12 J/(kg K)   
40
Thermal Conductivity
71.60 W/m·K   
24
20.00 W/m·K   
99+
Critical Temperature
Not Available   
Not Available   
Molar Heat Capacity
25.86 J/mol·K   
35
26.40 J/mol·K   
28
Thermal Expansion
8.80 µm/(m·K)   
99+
23.50 µm/(m·K)   
16
Standard Molar Entropy
41.60 J/mol.K   
36
Not Available   
Enthalpy
  
  
Enthalpy of Vaporization
510.50 kJ/mol   
11
60.30 kJ/mol   
99+
Enthalpy of Fusion
19.70 kJ/mol   
12
13.00 kJ/mol   
26
Enthalpy of Atomization
565.00 kJ/mol   
11
134.00 kJ/mol   
99+
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