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Properties of Platinum and Gold

Platinum
Gold
Properties of Gold & Platinum


Physical Properties
Melting Point
1,772.00 °C   
16
1,064.43 °C   
99+
Boiling Point
3,827.00 °C   
15
2,807.00 °C   
36
Hardness
  
  
Mohs Hardness
3.50   
11
2.50   
14
Brinell Hardness
300.00 MPa   
34
194.00 MPa   
99+
Vickers Hardness
400.00 MPa   
25
216.00 MPa   
31
Optical Properties
  
  
Refractive Index
Not Available   
Not Available   
Reflectivity
73.00 %   
8
95.00 %   
2
Speed of Sound
2,800.00 m/s   
29
2,030.00 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
Pt   
Au   
Isotopes
  
  
Known Isotopes
35   
4
36   
3
Electronegativity
  
  
Pauling Electronegativity
2.28   
3
2.54   
1
Sanderson Electronegativity
Not Available   
Not Available   
Allred Rochow Electronegativity
1.44   
17
1.42   
18
Mulliken-Jaffe Electronegativity
Not Available   
1.87   
7
Allen Electronegativity
1.72   
16
1.92   
5
Electropositivity
  
  
Pauling Electropositivity
1.72   
99+
1.46   
99+
Ionization Energies
  
  
1st Energy Level
870.00 kJ/mol   
10
890.10 kJ/mol   
8
2nd Energy Level
1,791.00 kJ/mol   
21
1,980.00 kJ/mol   
12
3rd Energy Level
Not Available   
Not Available   
Electrochemical Equivalent
1.82 g/amp-hr   
35
2.45 g/amp-hr   
21
Electron Work Function
5.65 eV   
1
5.10 eV   
4
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   
?
Stable metals are non radioactive metals and have zero valence electrons in the outer shell.Chemical Stability, 
?
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, 
?
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
19.30 g/cm3   
15
Density When Liquid (at m.p.)
19.77 g/cm3   
2
17.31 g/cm3   
6
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available   
0.00 (Pa)   
23
Vapor Pressure at 2000 K
0.07 (Pa)   
18
67.00 (Pa)   
4
Tensile Strength
125.00 MPa   
14
120.00 MPa   
15
Viscosity
Not Available   
Not Available   
Elasticity properties
  
  
Shear Modulus
61.00 GPa   
14
27.00 GPa   
27
Bulk Modulus
230.00 GPa   
6
180.00 GPa   
9
Young's Modulus
168.00 GPa   
14
79.00 GPa   
24
Poisson Ratio
0.38   
6
0.40   
4
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   
?
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
Pt   
Au   
Group Number
10   
8
11   
7
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 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
?
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   
?
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
78   
38
79   
37
Atomic Weight
47.87 amu   
99+
196.97 amu   
33
Atomic Volume
9.09 cm3/mol   
99+
10.20 cm3/mol   
99+
Electron Configuration
[Xe] 4f14 5d9 6s1   
[Xe] 4f14 5d10 6s1   
Valence Electron Potential
392.42 (-eV)   
1
43.40 (-eV)   
99+
Atom
  
  
Number of Protons
78   
38
79   
37
Number of Neutrons
117   
24
118   
23
Number of Electrons
78   
38
79   
37
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-Platinum.jpg#100   
FCC-Crystal-Structure-of-Gold.jpg#100   
Radius of an Atom
  
  
Atomic Radius
139.00 pm   
39
151.00 pm   
32
Covalent Radius
136.00 pm   
99+
144.00 pm   
40
Van der Waals Radius
175.00 pm   
36
166.00 pm   
39
Lattice Constant
392.42 pm   
24
407.82 pm   
21
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
1.61   
4
Adjacent Atomic Numbers
  
  
Next Element
Gold
  
Mercury
  
Previous Element
Iridium
  
Platinum
  
Magnetic Properties
Electrical Properties
  
  
Resistivity
105.00 nΩ·m   
30
2.20 nΩ·m   
99+
Electrical Conductivity
0.10 106/cm Ω   
21
0.45 106/cm Ω   
3
Electron Affinity
205.30 kJ/mol   
2
222.80 kJ/mol   
1
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
19.32   
8
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
0.00 H/m   
3
Not Available   
Susceptibility
Not Available   
Not Available   
Thermal Properties
Specific Heat
0.13 J/(kg K)   
39
0.13 J/(kg K)   
39
Thermal Conductivity
71.60 W/m·K   
24
318.00 W/m·K   
3
Critical Temperature
Not Available   
Not Available   
Molar Heat Capacity
25.86 J/mol·K   
35
25.42 J/mol·K   
40
Thermal Expansion
8.80 µm/(m·K)   
99+
14.20 µm/(m·K)   
26
Standard Molar Entropy
41.60 J/mol.K   
36
47.40 J/mol.K   
32
Enthalpy
  
  
Enthalpy of Vaporization
510.50 kJ/mol   
11
324.40 kJ/mol   
27
Enthalpy of Fusion
19.70 kJ/mol   
12
12.55 kJ/mol   
27
Enthalpy of Atomization
565.00 kJ/mol   
11
364.00 kJ/mol   
25
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