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Mercury vs Molybdenum

Mercury
Molybdenum
Molybdenum vs Mercury


Periodic Table
Symbol
Hg   
Mo   
Group Number
12   
6
6   
12
Period Number
6   
5   
Block
d block   
d block   
Element Family
Transition Metal   
Transition Metal   
CAS Number
7439976   
99+
7439987   
99+
Space Group Name
R_ 3m   
Im_ 3m   
Space Group Number
166.00   
6
229.00   
1
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.
  
  • Molybdenum is highly reactive metal, hence not found free in nature .
  • Till 18th century Molybdenum element were often mistaken as a carbon or Lead.
  
Sources
Mining, Ores of Minerals   
Found in Minerals, Mining, Ores of Minerals   
History
  
  
Who Discovered
Ancient Chinese and Indians   
Carl Wilhelm Scheele   
Discovery
Before 2000 BCE   
In 1778   
Abundance
  
  
Abundance In Universe
Not Available   
5 * 10-7 %   
19
Abundance In Sun
~-9999 %   
~0.0000009 %   
19
Abundance In Meteorites
Not Available   
0.00 %   
24
Abundance In Earth's Crust
0.05 %   
9
0.00 %   
39
Abundance In Oceans
Not Available   
0.00 %   
9
Abundance In Humans
Not Available   
0.00 %   
14
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.
  
  • Its alloys are used to make engine parts, drills, saw blade, etc.
  • Lubricant additive made up of Molybdenum disulfide is commonly used in the industry. It is also used as a catalyst.
  
Industrial Uses
Electrical Industry, Electronic Industry   
Aerospace 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
0.00 Blood/mg dm-3   
31
In Bone
0.45 p.p.m.   
19
0.70 p.p.m.   
18
Physical Properties
Melting Point
Not Available   
2,617.00 °C   
5
Boiling Point
356.58 °C   
99+
4,612.00 °C   
9
Appearance
  
  
Physical State
Liquid   
Solid   
Color
Silver   
Gray   
Luster
NA   
Metallic   
Hardness
  
  
Mohs Hardness
Not Available   
5.50   
7
Brinell Hardness
Not Available   
1,370.00 MPa   
7
Vickers Hardness
Not Available   
1,400.00 MPa   
6
Speed of Sound
1,451.40 m/s   
99+
5,400.00 m/s   
6
Optical Properties
  
  
Refractive Index
1.00   
3
Not Available   
Reflectivity
73.00 %   
8
58.00 %   
15
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   
Mo   
Isotopes
  
  
Known Isotopes
34   
5
25   
14
Electronegativity
  
  
Pauling Electronegativity
2.00   
7
2.16   
5
Sanderson Electronegativity
2.20   
7
1.15   
19
Allred Rochow Electronegativity
1.44   
17
1.30   
24
Mulliken-Jaffe Electronegativity
1.81   
9
Not Available   
Allen Electronegativity
1.44   
30
2.16   
3
Electropositivity
  
  
Pauling Electropositivity
2.00   
99+
1.84   
99+
Ionization Energies
  
  
1st Energy Level
1,007.10 kJ/mol   
4
684.30 kJ/mol   
37
2nd Energy Level
1,810.00 kJ/mol   
20
1,560.00 kJ/mol   
37
3rd Energy Level
3,300.00 kJ/mol   
20
2,618.00 kJ/mol   
99+
4th Energy Level
Not Available   
4,480.00 kJ/mol   
26
5th Energy Level
Not Available   
5,257.00 kJ/mol   
32
6th Energy Level
Not Available   
6,640.80 kJ/mol   
22
7th Energy level
Not Available   
12,125.00 kJ/mol   
13
8th Energy Level
Not Available   
13,860.00 kJ/mol   
16
9th Energy Level
Not Available   
15,835.00 kJ/mol   
16
10th Energy Level
Not Available   
17,980.00 kJ/mol   
18
11th Energy Level
Not Available   
20,190.00 kJ/mol   
17
12th Energy Level
Not Available   
22,219.00 kJ/mol   
15
13th Energy Level
Not Available   
26,930.00 kJ/mol   
13
14th Energy Level
Not Available   
29,196.00 kJ/mol   
13
15th Energy Level
Not Available   
52,490.00 kJ/mol   
7
16th Energy Level
Not Available   
55,000.00 kJ/mol   
8
17th Energy Level
Not Available   
61,400.00 kJ/mol   
9
18th Energy Level
Not Available   
67,700.00 kJ/mol   
9
19th Energy Level
Not Available   
74,000.00 kJ/mol   
9
20th Energy Level
Not Available   
80,400.00 kJ/mol   
10
21st Energy Level
Not Available   
87,000.00 kJ/mol   
9
22nd Energy Level
Not Available   
93,400.00 kJ/mol   
7
23rd Energy Level
Not Available   
98,420.00 kJ/mol   
6
24th Energy Level
Not Available   
104,400.00 kJ/mol   
2
25th Energy Level
Not Available   
121,900.00 kJ/mol   
1
26th Energy Level
Not Available   
127,700.00 kJ/mol   
1
27th Energy Level
Not Available   
133,800.00 kJ/mol   
1
28th Energy Level
Not Available   
139,800.00 kJ/mol   
1
29th Energy Level
Not Available   
148,100.00 kJ/mol   
1
30th Energy Level
Not Available   
154,500.00 kJ/mol   
1
Electrochemical Equivalent
3.74 g/amp-hr   
10
0.89 g/amp-hr   
99+
Electron Work Function
4.49 eV   
15
4.60 eV   
12
Other Chemical Properties
Flammability, Ionization, Solubility   
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility   
Atomic Properties
Atomic Number
80   
36
42   
99+
Electron Configuration
[Xe] 4f14 5d10 6s2   
[Kr] 4d5 5s1   
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
42   
99+
Number of Neutrons
121   
22
54   
99+
Number of Electrons
80   
36
42   
99+
Radius of an Atom
  
  
Atomic Radius
151.00 pm   
32
139.00 pm   
39
Covalent Radius
132.00 pm   
99+
154.00 pm   
32
Van der Waals Radius
155.00 pm   
99+
200.00 pm   
28
Atomic Weight
200.59 amu   
32
95.95 amu   
99+
Atomic Volume
14.82 cm3/mol   
35
9.40 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Gold
  
Niobium
  
Next Element
Thallium
  
Technetium
  
Valence Electron Potential
28.20 (-eV)   
99+
88.60 (-eV)   
13
Lattice Constant
300.50 pm   
99+
314.70 pm   
99+
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
10.28 g/cm3   
36
Density When Liquid (at m.p.)
Not Available   
9.33 g/cm3   
20
Tensile Strength
Not Available   
324.00 MPa   
13
Viscosity
0.00   
1
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 2000 K
Not Available   
0.00 (Pa)   
26
Elasticity properties
  
  
Shear Modulus
Not Available   
126.00 GPa   
8
Bulk Modulus
Not Available   
230.00 GPa   
6
Young's Modulus
Not Available   
329.00 GPa   
6
Poisson Ratio
Not Available   
0.31   
13
Other Mechanical Properties
NA   
Ductile, Weldable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
13.53   
16
10.22   
27
Magnetic Ordering
Diamagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Semiconductor   
Resistivity
961.00 nΩ·m   
1
53.40 nΩ·m   
99+
Electrical Conductivity
0.01 106/cm Ω   
99+
0.19 106/cm Ω   
11
Electron Affinity
0.00 kJ/mol   
40
71.90 kJ/mol   
14
Thermal Properties
Specific Heat
0.14 J/(kg K)   
38
0.25 J/(kg K)   
21
Molar Heat Capacity
27.98 J/mol·K   
13
24.06 J/mol·K   
99+
Thermal Conductivity
8.30 W/m·K   
99+
138.00 W/m·K   
12
Critical Temperature
1,750.00 K   
6
Not Available   
Thermal Expansion
60.40 µm/(m·K)   
5
4.80 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Vaporization
56.90 kJ/mol   
99+
594.10 kJ/mol   
8
Enthalpy of Fusion
2.29 kJ/mol   
99+
27.61 kJ/mol   
5
Enthalpy of Atomization
61.50 kJ/mol   
99+
653.00 kJ/mol   
7
Standard Molar Entropy
75.80 J/mol.K   
6
28.70 J/mol.K   
99+
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