Mercury Manganese Comparison
Periodic Table
Symbol
Hg
Mn
Group Number
12
6
7
11
Period Number
6
4
Block
d block
d block
Element Family
Transition Metal
Transition Metal
CAS Number
7439976
99+
7439965
99+
Space Group Name
R_ 3m
I_ 43m
Space Group Number
166.00
6
217.00
4
Facts
Interesting Facts
- 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.
- Manganese is an essential trace element in all forms of life.
- Manganese metal oxidizes very easily, but it does not fuse that easily.
Sources
Mining, Ores of Minerals
Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Ancient Chinese and Indians
Johann Gottlieb Gahn
Discovery
Before 2000 BCE
In 1774
Abundance
Abundance In Universe
Not Available
8 * 10-4 %
8
Abundance In Sun
~-9999 %
~0.001 %
8
Abundance In Meteorites
Not Available
0.27 %
8
Abundance In Earth's Crust
0.05 %
9
0.11 %
8
Abundance In Oceans
Not Available
0.00 %
13
Abundance In Humans
Not Available
0.00 %
13
Uses
Uses & Benefits
- 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.
- This metal is very brittle hence it mostly not used as a pure metal, but its alloys are very useful
- Its alloy Manganese steel is extremely strong and used in railway tracks, safes, prison bars and riffle barrels.
Industrial Uses
Electrical Industry, Electronic Industry
Automobile Industry, Electrical Industry, Electronic Industry
Medical Uses
Dentistry
NA
Other Uses
Alloys, Mirror Manufacturing, Pharmaceutical Industry
Alloys
Biological Properties
Toxicity
Highly Toxic
Toxic
Present in Human Body
Yes
Yes
In Blood
0.01 Blood/mg dm-3
23
0.08 Blood/mg dm-3
14
In Bone
0.45 p.p.m.
19
100.00 p.p.m.
8
Physical Properties
Melting Point
Not Available
1,245.00 °C
37
Boiling Point
356.58 °C
99+
1,962.00 °C
99+
Appearance
Physical State
Liquid
Solid
Color
Silver
Silver
Luster
NA
Metallic
Hardness
Mohs Hardness
Not Available
6.00
6
Brinell Hardness
Not Available
196.00 MPa
99+
Speed of Sound
1,451.40 m/s
99+
5,150.00 m/s
7
Optical Properties
Refractive Index
1.00
3
Not Available
Reflectivity
73.00 %
8
Not Available
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
Hg
Mn
Isotopes
Known Isotopes
34
5
21
18
Electronegativity
Pauling Electronegativity
2.00
7
1.55
25
Sanderson Electronegativity
2.20
7
2.20
7
Allred Rochow Electronegativity
1.44
17
1.60
9
Mulliken-Jaffe Electronegativity
1.81
9
Not Available
Allen Electronegativity
1.44
30
1.75
15
Electropositivity
Pauling Electropositivity
2.00
99+
2.45
29
Ionization Energies
1st Energy Level
1,007.10 kJ/mol
4
717.30 kJ/mol
30
2nd Energy Level
1,810.00 kJ/mol
20
1,509.00 kJ/mol
39
3rd Energy Level
3,300.00 kJ/mol
20
3,248.00 kJ/mol
21
4th Energy Level
Not Available
4,940.00 kJ/mol
20
5th Energy Level
Not Available
6,990.00 kJ/mol
17
6th Energy Level
Not Available
9,220.00 kJ/mol
16
7th Energy level
Not Available
11,500.00 kJ/mol
16
8th Energy Level
Not Available
18,770.00 kJ/mol
5
9th Energy Level
Not Available
21,400.00 kJ/mol
6
10th Energy Level
Not Available
23,960.00 kJ/mol
9
11th Energy Level
Not Available
27,590.00 kJ/mol
10
12th Energy Level
Not Available
30,330.00 kJ/mol
10
13th Energy Level
Not Available
33,150.00 kJ/mol
11
14th Energy Level
Not Available
38,880.00 kJ/mol
10
15th Energy Level
Not Available
41,987.00 kJ/mol
13
16th Energy Level
Not Available
109,480.00 kJ/mol
1
17th Energy Level
Not Available
118,100.00 kJ/mol
2
18th Energy Level
Not Available
127,100.00 kJ/mol
3
19th Energy Level
Not Available
138,600.00 kJ/mol
4
20th Energy Level
Not Available
148,500.00 kJ/mol
6
21st Energy Level
Not Available
158,600.00 kJ/mol
6
22nd Energy Level
Not Available
172,500.00 kJ/mol
5
23rd Energy Level
Not Available
181,380.00 kJ/mol
5
Electrochemical Equivalent
3.74 g/amp-hr
10
0.29 g/amp-hr
99+
Electron Work Function
4.49 eV
15
4.10 eV
25
Other Chemical Properties
Flammability, Ionization, Solubility
Ionization, Radioactive Isotopes
Atomic Properties
Atomic Number
80
36
25
99+
Electron Configuration
[Xe] 4f14 5d10 6s2
[Ar] 3d5 4s2
Crystal Structure
Rhombohedral (RHO)
Body Centered Cubic (BCC)
Crystal Lattice
RHO-Crystal-Structure-of-Mercury.jpg#100
BCC-Crystal-Structure-.jpg#100
Atom
Number of Protons
80
36
25
99+
Number of Neutrons
121
22
30
99+
Number of Electrons
80
36
25
99+
Radius of an Atom
Atomic Radius
151.00 pm
32
127.00 pm
99+
Covalent Radius
132.00 pm
99+
139.00 pm
99+
Van der Waals Radius
155.00 pm
99+
200.00 pm
28
Atomic Weight
200.59 amu
32
54.94 amu
99+
Atomic Volume
14.82 cm3/mol
35
1.39 cm3/mol
99+
Adjacent Atomic Numbers
Valence Electron Potential
28.20 (-eV)
99+
220.00 (-eV)
2
Lattice Constant
300.50 pm
99+
891.25 pm
1
Lattice Angles
NA
π/2, π/2, π/2
Lattice C/A Ratio
Not Available
Not Available
Mechanical Properties
Density
Density At Room Temperature
13.53 g/cm3
24
7.21 g/cm3
99+
Density When Liquid (at m.p.)
Not Available
5.95 g/cm3
99+
Tensile Strength
Not Available
Not Available
Viscosity
0.00
1
Not Available
Vapor Pressure
Vapor Pressure at 1000 K
Not Available
0.00 (Pa)
12
Elasticity properties
Bulk Modulus
Not Available
120.00 GPa
14
Young's Modulus
Not Available
198.00 GPa
12
Poisson Ratio
Not Available
Not Available
Other Mechanical Properties
NA
NA
Magnetic Properties
Magnetic Characteristics
Specific Gravity
13.53
16
7.21
99+
Magnetic Ordering
Diamagnetic
Paramagnetic
Electrical Properties
Electrical Property
Conductor
Conductor
Resistivity
961.00 nΩ·m
1
1.44 nΩ·m
99+
Electrical Conductivity
0.01 106/cm Ω
99+
0.01 106/cm Ω
99+
Electron Affinity
0.00 kJ/mol
40
0.00 kJ/mol
40
Thermal Properties
Specific Heat
0.14 J/(kg K)
38
0.48 J/(kg K)
11
Molar Heat Capacity
27.98 J/mol·K
13
26.32 J/mol·K
29
Thermal Conductivity
8.30 W/m·K
99+
7.81 W/m·K
99+
Critical Temperature
1,750.00 K
6
Not Available
Thermal Expansion
60.40 µm/(m·K)
5
21.70 µm/(m·K)
21
Enthalpy
Enthalpy of Vaporization
56.90 kJ/mol
99+
219.70 kJ/mol
99+
Enthalpy of Fusion
2.29 kJ/mol
99+
14.64 kJ/mol
23
Enthalpy of Atomization
61.50 kJ/mol
99+
280.30 kJ/mol
38
Standard Molar Entropy
75.80 J/mol.K
6
32.00 J/mol.K
99+
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