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Properties of Magnesium and Gold


Properties of Gold & Magnesium


Physical Properties

Melting Point
650.00 °C   
99+
1,064.43 °C   
99+

Boiling Point
1,107.00 °C   
99+
2,807.00 °C   
36

Hardness
  
  

Mohs Hardness
2.50   
14
2.50   
14

Brinell Hardness
260.00 MPa   
36
194.00 MPa   
99+

Vickers Hardness
Not Available   
216.00 MPa   
31

Optical Properties
  
  

Refractive Index
Not Available   
Not Available   

Reflectivity
74.00 %   
7
95.00 %   
2

Speed of Sound
4,940.00 m/s   
11
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
Mg   
Au   

Isotopes
  
  

Known Isotopes
15   
24
36   
3

Electronegativity
  
  

Pauling Electronegativity
1.31   
31
2.54   
1

Sanderson Electronegativity
1.32   
18
Not Available   

Allred Rochow Electronegativity
1.23   
25
1.42   
18

Mulliken-Jaffe Electronegativity
1.37   
16
1.87   
7

Allen Electronegativity
1.29   
35
1.92   
5

Electropositivity
  
  

Pauling Electropositivity
2.69   
23
1.46   
99+

Ionization Energies
  
  

1st Energy Level
737.70 kJ/mol   
24
890.10 kJ/mol   
8

2nd Energy Level
1,450.70 kJ/mol   
99+
1,980.00 kJ/mol   
12

3rd Energy Level
7,732.70 kJ/mol   
5
Not Available   

Electrochemical Equivalent
0.45 g/amp-hr   
99+
2.45 g/amp-hr   
21

Electron Work Function
3.66 eV   
29
5.10 eV   
4

Other Chemical Properties
?
Corrosion is a process which converts refined metals to their more stable forms, for example, its oxide and hydroxide. This process of metals getting corroded is a gradual destruction of metals by chemical reactions.Corrosion, 
?
Flammable metals have ability to burn or ignite, causing fire or combustion.Highly Inflammable, 
?
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
  
?
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
1.74 g/cm3   
99+
19.30 g/cm3   
15

Density When Liquid (at m.p.)
1.58 g/cm3   
99+
17.31 g/cm3   
6

Vapor Pressure
  
  

Vapor Pressure at 1000 K
Not Available   
0.00 (Pa)   
23

Vapor Pressure at 2000 K
Not Available   
67.00 (Pa)   
4

Tensile Strength
Not Available   
120.00 MPa   
15

Viscosity
Not Available   
Not Available   

Elasticity properties
  
  

Shear Modulus
17.00 GPa   
37
27.00 GPa   
27

Bulk Modulus
45.00 GPa   
25
180.00 GPa   
9

Young's Modulus
45.00 GPa   
39
79.00 GPa   
24

Poisson Ratio
0.29   
15
0.40   
4

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
Mg   
Au   

Group Number
2   
16
11   
7

Period Number
3   
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 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
?
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
  
?
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
12   
99+
79   
37

Atomic Weight
24.31 amu   
99+
196.97 amu   
33

Atomic Volume
13.97 cm3/mol   
37
10.20 cm3/mol   
99+

Electron Configuration
[Ne] 3s2   
[Xe] 4f14 5d10 6s1   

Valence Electron Potential
40.00 (-eV)   
99+
43.40 (-eV)   
99+

Atom
  
  

Number of Protons
12   
99+
79   
37

Number of Neutrons
12   
99+
118   
23

Number of Electrons
12   
99+
79   
37

Crystal Structure
?
The hexagonal crystal system consists of the 7 point groups such that all their space groups have the hexagonal lattice as underlying lattice. The hexagonal crystal family consists of the 12 point groups such that at least one of their space groups has theHexagonal Close Packed (HCP)
  
?
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
HCP-Crystal-Structure-of-Magnesium.jpg#100   
FCC-Crystal-Structure-of-Gold.jpg#100   

Radius of an Atom
  
  

Atomic Radius
160.00 pm   
27
151.00 pm   
32

Covalent Radius
141.00 pm   
99+
144.00 pm   
40

Van der Waals Radius
173.00 pm   
37
166.00 pm   
39

Lattice Constant
320.94 pm   
99+
407.82 pm   
21

Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   

Lattice C/A Ratio
Not Available   
1.61   
4

Adjacent Atomic Numbers
  
  

Next Element
Aluminium
  
Mercury
  

Previous Element
Sodium
  
Platinum
  

Magnetic Properties

Electrical Properties
  
  

Resistivity
43.90 nΩ·m   
99+
2.20 nΩ·m   
99+

Electrical Conductivity
0.23 106/cm Ω   
7
0.45 106/cm Ω   
3

Electron Affinity
0.00 kJ/mol   
40
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
1.74   
99+
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
Not Available   
Not Available   

Susceptibility
Not Available   
Not Available   

Thermal Properties

Specific Heat
1.02 J/(kg K)   
4
0.13 J/(kg K)   
39

Thermal Conductivity
156.00 W/m·K   
8
318.00 W/m·K   
3

Critical Temperature
Not Available   
Not Available   

Molar Heat Capacity
24.87 J/mol·K   
99+
25.42 J/mol·K   
40

Thermal Expansion
24.80 µm/(m·K)   
15
14.20 µm/(m·K)   
26

Standard Molar Entropy
32.70 J/mol.K   
99+
47.40 J/mol.K   
32

Enthalpy
  
  

Enthalpy of Vaporization
128.70 kJ/mol   
99+
324.40 kJ/mol   
27

Enthalpy of Fusion
8.95 kJ/mol   
39
12.55 kJ/mol   
27

Enthalpy of Atomization
148.50 kJ/mol   
99+
364.00 kJ/mol   
25

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