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Francium Mercury Comparison

Francium
Mercury
Mercury Francium comparison


Periodic Table
Symbol
Fr  
Hg  
Group Number
1  
17
12  
6
Period Number
7  
6  
Block
s block  
d block  
Element Family
Alkali  
Transition Metal  
CAS Number
7440735  
18
7439976  
99+
Space Group Name
-  
R_ 3m  
Space Group Number
225.00  
3
166.00  
9
Facts
Interesting Facts
  • 223 Francium has the longest half life at 21.8.
  • Francium metal is produced by alpha decay in 227Actinium 227.
  
  • At room temperature mercury is found in a liquid state.
  • A coin of pound or rupees floats in mercury.
  • Because of its low melting point and boiling point it is used in thermometers.
  
Sources
Formed by Decay Process, Mining  
Mining, Ores of Minerals  
History
  
  
Who Discovered
Marguerite Perey  
Ancient Chinese and Indians  
Discovery
In 1939  
Before 2000 BCE  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.09 %  
2
Abundance In Sun
0.00 %  
30
0.00 %  
30
Abundance In Meteorites
0.00 %  
99+
0.00 %  
99+
Abundance In Earth's Crust
0.00 %  
99+
0.05 %  
9
Abundance In Oceans
-  
-  
Abundance In Humans
0.00 %  
24
0.00 %  
24
Uses
Uses & Benefits
  • Francium has no known uses as it has a half life of only 22 minutes.
  
  • It is a liquid metal at room temperature, but it is a toxic heavy metal and hence many uses of mercury are under review or phased out.
  • It is manly used as a catalysts in chemical industry.
  
Industrial Uses
-  
Electrical Industry, Electronic Industry  
Medical Uses
-  
Dentistry  
Other Uses
-  
Alloys, Mirror Manufacturing, Pharmaceutical Industry  
Biological Properties
  
  
Toxicity
-  
Highly Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
40
0.01 Blood/mg dm-3  
23
In Bone
0.00 p.p.m.  
99+
0.45 p.p.m.  
23
Physical
Melting Point
27.00 °C  
99+
-38.83 °C  
99+
Boiling Point
677.00 °C  
99+
356.58 °C  
99+
Appearance
  
  
Physical State
Solid  
Liquid  
Color
-  
Silver  
Luster
-  
-  
Hardness
  
  
Mohs Hardness
0.20  
27
1.50  
19
Brinell Hardness
119.00 MPa  
99+
5.00 MPa  
99+
Vickers Hardness
300.00 MPa  
99+
0.00 MPa  
99+
Speed of Sound
2,440.00 m/s  
99+
1,451.40 m/s  
99+
Optical Properties
  
  
Refractive Index
1.70  
27
1.00  
99+
Reflectivity
72.00 %  
11
73.00 %  
10
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Fr  
Hg  
Isotopes
  
  
Known Isotopes
33  
6
34  
5
Electronegativity
  
  
Pauling Electronegativity
0.70  
99+
2.00  
8
Sanderson Electronegativity
0.70  
99+
2.20  
8
Allred Rochow Electronegativity
0.86  
99+
1.44  
18
Mulliken-Jaffe Electronegativity
0.68  
99+
1.81  
17
Allen Electronegativity
0.67  
99+
1.44  
34
Electropositivity
  
  
Pauling Electropositivity
3.30  
1
2.00  
99+
Ionization Energies
  
  
1st Energy Level
380.00 kJ/mol  
99+
1,007.10 kJ/mol  
4
2nd Energy Level
392.80 kJ/mol  
99+
1,810.00 kJ/mol  
21
3rd Energy Level
392.80 kJ/mol  
99+
3,300.00 kJ/mol  
20
4th Energy Level
392.80 kJ/mol  
99+
1,007.10 kJ/mol  
99+
5th Energy Level
392.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
6th Energy Level
3,920.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
7th Energy level
3,920.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
8th Energy Level
3,920.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
9th Energy Level
3,920.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
10th Energy Level
392.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
11th Energy Level
392.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
12th Energy Level
38,000.00 kJ/mol  
23
1,007.00 kJ/mol  
99+
13th Energy Level
3,920.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
14th Energy Level
380.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
15th Energy Level
67,700.00 kJ/mol  
32
100,700.00 kJ/mol  
1
16th Energy Level
39,200.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
17th Energy Level
392.00 kJ/mol  
99+
1,007.00 kJ/mol  
24
18th Energy Level
3,920.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
19th Energy Level
392.80 kJ/mol  
99+
1,007.10 kJ/mol  
20
20th Energy Level
392.00 kJ/mol  
99+
1,007.00 kJ/mol  
11
21st Energy Level
392.00 kJ/mol  
99+
1,007.00 kJ/mol  
33
22nd Energy Level
392.00 kJ/mol  
99+
1,007.00 kJ/mol  
8
23rd Energy Level
392.80 kJ/mol  
99+
1,007.00 kJ/mol  
36
24th Energy Level
392.00 kJ/mol  
99+
1,007.10 kJ/mol  
3
25th Energy Level
392.00 kJ/mol  
99+
1,007.10 kJ/mol  
3
26th Energy Level
392.80 kJ/mol  
99+
1,007.10 kJ/mol  
3
27th Energy Level
392.00 kJ/mol  
99+
1,007.10 kJ/mol  
2
28th Energy Level
380.00 kJ/mol  
99+
1,007.10 kJ/mol  
5
29th Energy Level
392.00 kJ/mol  
99+
1,007.10 kJ/mol  
6
30th Energy Level
677.00 kJ/mol  
31
1,007.10 kJ/mol  
3
Electrochemical Equivalent
8.32 g/amp-hr  
1
3.74 g/amp-hr  
10
Electron Work Function
4.07 eV  
33
4.49 eV  
20
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Flammability, Ionization, Solubility  
Atomic
Atomic Number
87  
31
80  
36
Electron Configuration
[Rn] 7s1  
[Xe] 4f14 5d10 6s2  
Crystal Structure
Body Centered Cubic (BCC)  
Rhombohedral (RHO)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
RHO-Crystal-Structure-of-Mercury.jpg#100  
Atom
  
  
Number of Protons
87  
31
80  
36
Number of Neutrons
136  
18
121  
23
Number of Electrons
87  
31
80  
36
Radius of an Atom
  
  
Atomic Radius
348.00 pm  
1
151.00 pm  
34
Covalent Radius
260.00 pm  
1
132.00 pm  
99+
Van der Waals Radius
348.00 pm  
1
155.00 pm  
99+
Atomic Weight
223.00 amu  
27
200.59 amu  
32
Atomic Volume
71.00 cm3/mol  
2
14.82 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Polonium
  
Gold
  
Next Element
Radium
  
Thallium
  
Valence Electron Potential
8.00 (-eV)  
99+
28.20 (-eV)  
99+
Lattice Constant
440.00 pm  
21
300.50 pm  
99+
Lattice Angles
-  
-  
Lattice C/A Ratio
1.56  
99+
0.42  
99+
Mechanical
Density
  
  
Density At Room Temperature
1.87 g/cm3  
99+
13.53 g/cm3  
25
Density When Liquid (at m.p.)
1.87 g/cm3  
99+
13.55 g/cm3  
27
Tensile Strength
50.00 MPa  
38
15.00 MPa  
99+
Viscosity
0.00  
25
0.00  
4
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
22
Vapor Pressure at 2000 K
0.00 (Pa)  
24
0.00 (Pa)  
99+
Elasticity properties
  
  
Shear Modulus
3.60 GPa  
99+
30.00 GPa  
27
Bulk Modulus
6.00 GPa  
99+
25.00 GPa  
99+
Young's Modulus
0.00 GPa  
99+
45.00 GPa  
99+
Poisson Ratio
0.44  
3
0.44  
3
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
0.87  
99+
13.53  
27
Magnetic Ordering
Paramagnetic  
Diamagnetic  
Permeability
0.00 H/m  
13
0.00 H/m  
10
Susceptibility
0.00  
24
0.00  
20
Electrical Properties
  
  
Electrical Property
Poor Conductor  
Conductor  
Resistivity
3.00 nΩ·m  
99+
961.00 nΩ·m  
1
Electrical Conductivity
0.03 106/cm Ω  
99+
0.01 106/cm Ω  
99+
Electron Affinity
0.70 kJ/mol  
99+
0.00 kJ/mol  
99+
Thermal
Specific Heat
0.15 J/(kg K)  
37
0.14 J/(kg K)  
39
Molar Heat Capacity
27.00 J/mol·K  
29
27.98 J/mol·K  
16
Thermal Conductivity
15.00 W/m·K  
99+
8.30 W/m·K  
99+
Critical Temperature
300.00 K  
99+
1,750.00 K  
33
Thermal Expansion
18.90 µm/(m·K)  
25
60.40 µm/(m·K)  
5
Enthalpy
  
  
Enthalpy of Vaporization
67.00 kJ/mol  
99+
56.90 kJ/mol  
99+
Enthalpy of Fusion
2.30 kJ/mol  
99+
2.29 kJ/mol  
99+
Enthalpy of Atomization
71.00 kJ/mol  
99+
61.50 kJ/mol  
99+
Standard Molar Entropy
42.00 J/mol.K  
99+
75.80 J/mol.K  
6
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