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Properties of Francium and Magnesium


Properties of Magnesium & Francium


Physical Properties

Melting Point
27.00 °C   
99+
650.00 °C   
99+

Boiling Point
677.00 °C   
99+
1,107.00 °C   
99+

Hardness
  
  

Mohs Hardness
Not Available   
2.50   
14

Brinell Hardness
Not Available   
260.00 MPa   
36

Vickers Hardness
Not Available   
Not Available   

Optical Properties
  
  

Refractive Index
Not Available   
Not Available   

Reflectivity
Not Available   
74.00 %   
7

Speed of Sound
Not Available   
4,940.00 m/s   
11

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
Fr   
Mg   

Isotopes
  
  

Known Isotopes
33   
6
15   
24

Electronegativity
  
  

Pauling Electronegativity
0.70   
99+
1.31   
31

Sanderson Electronegativity
Not Available   
1.32   
18

Allred Rochow Electronegativity
0.86   
99+
1.23   
25

Mulliken-Jaffe Electronegativity
0.68   
25
1.37   
16

Allen Electronegativity
0.67   
99+
1.29   
35

Electropositivity
  
  

Pauling Electropositivity
3.30   
1
2.69   
23

Ionization Energies
  
  

1st Energy Level
380.00 kJ/mol   
99+
737.70 kJ/mol   
24

2nd Energy Level
Not Available   
1,450.70 kJ/mol   
99+

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

Electrochemical Equivalent
8.32 g/amp-hr   
1
0.45 g/amp-hr   
99+

Electron Work Function
Not Available   
3.66 eV   
29

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
  
?
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
  

Mechanical Properties

Density
  
  

Density At Room Temperature
1.87 g/cm3   
99+
1.74 g/cm3   
99+

Density When Liquid (at m.p.)
Not Available   
1.58 g/cm3   
99+

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   
17.00 GPa   
37

Bulk Modulus
Not Available   
45.00 GPa   
25

Young's Modulus
Not Available   
45.00 GPa   
39

Poisson Ratio
Not Available   
0.29   
15

Other Mechanical Properties
NA   
NA   

Periodic Table

Symbol
Fr   
Mg   

Group Number
1   
17
2   
16

Period Number
7   
3   

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 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 alkali metals are placed under group number 1 and s-block of periodic table. These metals are highly reactive and are found in ores of other metals and minerals. Alkali metals can be easily distinguished from others as these metals have only 1 electronAlkali
  
?
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
87   
31
12   
99+

Atomic Weight
223.00 amu   
27
24.31 amu   
99+

Atomic Volume
Not Available   
13.97 cm3/mol   
37

Electron Configuration
[Rn] 7s1   
[Ne] 3s2   

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

Atom
  
  

Number of Protons
87   
31
12   
99+

Number of Neutrons
136   
17
12   
99+

Number of Electrons
87   
31
12   
99+

Crystal Structure
?
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)
  
?
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)
  

Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
HCP-Crystal-Structure-of-Magnesium.jpg#100   

Radius of an Atom
  
  

Atomic Radius
Not Available   
160.00 pm   
27

Covalent Radius
260.00 pm   
1
141.00 pm   
99+

Van der Waals Radius
348.00 pm   
1
173.00 pm   
37

Lattice Constant
Not Available   
320.94 pm   
99+

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

Lattice C/A Ratio
Not Available   
Not Available   

Adjacent Atomic Numbers
  
  

Next Element
Radium
  
Aluminium
  

Previous Element
Polonium
  
Sodium
  

Magnetic Properties

Electrical Properties
  
  

Resistivity
3.00 nΩ·m   
99+
43.90 nΩ·m   
99+

Electrical Conductivity
0.03 106/cm Ω   
40
0.23 106/cm Ω   
7

Electron Affinity
Not Available   
0.00 kJ/mol   
40

Electrical Property
?
Poor conductor metals have moderate resistance to electric currents. They can conduct electric current through them with very low efficiency.Poor Conductor
  
?
Conductor metals have very low resistance to electric currents. They can easily conduct electric current through them.Conductor
  

Magnetic Characteristics
  
  

Specific Gravity
Not Available   
1.74   
99+

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
  
?
Paramagnetic metals are slightly attracted by magnet, but they can’t retain the magnetic effect once they are removed from the magnetic field.Paramagnetic
  

Permeability
Not Available   
Not Available   

Susceptibility
Not Available   
Not Available   

Thermal Properties

Specific Heat
Not Available   
1.02 J/(kg K)   
4

Thermal Conductivity
15.00 W/m·K   
99+
156.00 W/m·K   
8

Critical Temperature
Not Available   
Not Available   

Molar Heat Capacity
Not Available   
24.87 J/mol·K   
99+

Thermal Expansion
Not Available   
24.80 µm/(m·K)   
15

Standard Molar Entropy
Not Available   
32.70 J/mol.K   
99+

Enthalpy
  
  

Enthalpy of Vaporization
Not Available   
128.70 kJ/mol   
99+

Enthalpy of Fusion
Not Available   
8.95 kJ/mol   
39

Enthalpy of Atomization
71.00 kJ/mol   
99+
148.50 kJ/mol   
99+

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