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Radium vs Mercury

Radium
Mercury
Mercury vs Radium


Periodic Table
Symbol
Ra  
Hg  
Group Number
2  
16
12  
6
Period Number
7  
6  
Block
s block  
d block  
Element Family
Alkaline Earth  
Transition Metal  
CAS Number
7440144  
99+
7439976  
99+
Space Group Name
Im_ 3m  
R_ 3m  
Space Group Number
229.00  
2
166.00  
9
Facts
Interesting Facts
  • Radium metal is the heaviest metal of Alkaline earth metals column.
  • Radium metal is highly radioactive and does not have any stable isotopes.
  
  • 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
Mining, Ores of metals  
Mining, Ores of Minerals  
History
  
  
Who Discovered
-  
Ancient Chinese and Indians  
Discovery
In 1898  
Before 2000 BCE  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.09 %  
2
Abundance In Sun
0.00 %  
26
0.00 %  
30
Abundance In Meteorites
-  
0.00 %  
99+
Abundance In Earth's Crust
0.00 %  
99+
0.05 %  
9
Abundance In Oceans
0.00 %  
99+
-  
Abundance In Humans
0.00 %  
23
0.00 %  
24
Uses
Uses & Benefits
  • It is a highly radioactive metal; and sometime Radium-223 is used to treat prostate cancer.
  • It is used in luminous paints.
  
  • 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
Pharmaceutical Industry  
Dentistry  
Other Uses
-  
Alloys, Mirror Manufacturing, Pharmaceutical Industry  
Biological Properties
  
  
Toxicity
Highly Toxic  
Highly Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
34
0.01 Blood/mg dm-3  
23
In Bone
0.00 p.p.m.  
99+
0.45 p.p.m.  
23
Physical
Melting Point
700.00 °C  
99+
-38.83 °C  
99+
Boiling Point
1,737.00 °C  
99+
356.58 °C  
99+
Appearance
  
  
Physical State
Solid  
Liquid  
Color
Silvery White  
Silver  
Luster
Metallic  
-  
Hardness
  
  
Mohs Hardness
1.00  
22
1.50  
19
Brinell Hardness
700.00 MPa  
17
5.00 MPa  
99+
Vickers Hardness
140.00 MPa  
99+
0.00 MPa  
99+
Speed of Sound
3,150.00 m/s  
37
1,451.40 m/s  
99+
Optical Properties
  
  
Refractive Index
1.00  
99+
1.00  
99+
Reflectivity
83.00 %  
6
73.00 %  
10
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ra  
Hg  
Isotopes
  
  
Known Isotopes
33  
6
34  
5
Electronegativity
  
  
Pauling Electronegativity
0.90  
99+
2.00  
8
Sanderson Electronegativity
0.89  
99+
2.20  
8
Allred Rochow Electronegativity
0.97  
39
1.44  
18
Mulliken-Jaffe Electronegativity
0.92  
99+
1.81  
17
Allen Electronegativity
0.89  
99+
1.44  
34
Electropositivity
  
  
Pauling Electropositivity
3.10  
5
2.00  
99+
Ionization Energies
  
  
1st Energy Level
509.30 kJ/mol  
99+
1,007.10 kJ/mol  
4
2nd Energy Level
979.00 kJ/mol  
99+
1,810.00 kJ/mol  
21
3rd Energy Level
509.30 kJ/mol  
99+
3,300.00 kJ/mol  
20
4th Energy Level
5,093.00 kJ/mol  
27
1,007.10 kJ/mol  
99+
5th Energy Level
5,090.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
6th Energy Level
5,090.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
7th Energy level
5,090.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
8th Energy Level
5,090.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
9th Energy Level
5,090.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
10th Energy Level
5,090.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
11th Energy Level
5,090.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
12th Energy Level
5,090.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
13th Energy Level
5,090.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
14th Energy Level
5,090.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
15th Energy Level
50,900.00 kJ/mol  
99+
100,700.00 kJ/mol  
1
16th Energy Level
50,900.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
17th Energy Level
509.30 kJ/mol  
99+
1,007.00 kJ/mol  
24
18th Energy Level
5,090.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
19th Energy Level
509.30 kJ/mol  
99+
1,007.10 kJ/mol  
20
20th Energy Level
509.00 kJ/mol  
99+
1,007.00 kJ/mol  
11
21st Energy Level
509.30 kJ/mol  
99+
1,007.00 kJ/mol  
33
22nd Energy Level
509.00 kJ/mol  
99+
1,007.00 kJ/mol  
8
23rd Energy Level
509.30 kJ/mol  
99+
1,007.00 kJ/mol  
36
24th Energy Level
509.30 kJ/mol  
99+
1,007.10 kJ/mol  
3
25th Energy Level
509.00 kJ/mol  
99+
1,007.10 kJ/mol  
3
26th Energy Level
509.30 kJ/mol  
99+
1,007.10 kJ/mol  
3
27th Energy Level
509.30 kJ/mol  
99+
1,007.10 kJ/mol  
2
28th Energy Level
509.30 kJ/mol  
99+
1,007.10 kJ/mol  
5
29th Energy Level
509.30 kJ/mol  
99+
1,007.10 kJ/mol  
6
30th Energy Level
509.00 kJ/mol  
99+
1,007.10 kJ/mol  
3
Electrochemical Equivalent
4.22 g/amp-hr  
6
3.74 g/amp-hr  
10
Electron Work Function
4.30 eV  
25
4.49 eV  
20
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Flammability, Ionization, Solubility  
Atomic
Atomic Number
88  
30
80  
36
Electron Configuration
[Rn] 7s2  
[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
88  
30
80  
36
Number of Neutrons
138  
17
121  
23
Number of Electrons
88  
30
80  
36
Radius of an Atom
  
  
Atomic Radius
215.00 pm  
6
151.00 pm  
34
Covalent Radius
221.00 pm  
3
132.00 pm  
99+
Van der Waals Radius
283.00 pm  
5
155.00 pm  
99+
Atomic Weight
226.00 amu  
26
200.59 amu  
32
Atomic Volume
45.20 cm3/mol  
5
14.82 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Francium
  
Gold
  
Next Element
Actinium
  
Thallium
  
Valence Electron Potential
20.10 (-eV)  
99+
28.20 (-eV)  
99+
Lattice Constant
514.80 pm  
15
300.50 pm  
99+
Lattice Angles
π/2, π/2, π/2  
-  
Lattice C/A Ratio
1.57  
99+
0.42  
99+
Mechanical
Density
  
  
Density At Room Temperature
5.50 g/cm3  
99+
13.53 g/cm3  
25
Density When Liquid (at m.p.)
5.50 g/cm3  
99+
13.55 g/cm3  
27
Tensile Strength
40.00 MPa  
99+
15.00 MPa  
99+
Viscosity
0.00  
2
0.00  
4
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
16
0.00 (Pa)  
22
Vapor Pressure at 2000 K
0.00 (Pa)  
33
0.00 (Pa)  
99+
Elasticity properties
  
  
Shear Modulus
25.00 GPa  
38
30.00 GPa  
27
Bulk Modulus
43.00 GPa  
33
25.00 GPa  
99+
Young's Modulus
83.00 GPa  
25
45.00 GPa  
99+
Poisson Ratio
0.31  
13
0.44  
3
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
5.00  
99+
13.53  
27
Magnetic Ordering
Nonmagnetic  
Diamagnetic  
Permeability
0.00 H/m  
9
0.00 H/m  
10
Susceptibility
0.00  
18
0.00  
20
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
100.00 nΩ·m  
31
961.00 nΩ·m  
1
Electrical Conductivity
0.00 106/cm Ω  
99+
0.01 106/cm Ω  
99+
Electron Affinity
0.90 kJ/mol  
99+
0.00 kJ/mol  
99+
Thermal
Specific Heat
0.12 J/(kg K)  
99+
0.14 J/(kg K)  
39
Molar Heat Capacity
20.05 J/mol·K  
99+
27.98 J/mol·K  
16
Thermal Conductivity
18.60 W/m·K  
99+
8.30 W/m·K  
99+
Critical Temperature
973.00 K  
99+
1,750.00 K  
33
Thermal Expansion
8.50 µm/(m·K)  
99+
60.40 µm/(m·K)  
5
Enthalpy
  
  
Enthalpy of Vaporization
113.00 kJ/mol  
99+
56.90 kJ/mol  
99+
Enthalpy of Fusion
8.60 kJ/mol  
99+
2.29 kJ/mol  
99+
Enthalpy of Atomization
163.00 kJ/mol  
99+
61.50 kJ/mol  
99+
Standard Molar Entropy
71.00 J/mol.K  
14
75.80 J/mol.K  
6
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