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Technetium vs Mercury

Technetium
Mercury
Mercury vs Technetium


Periodic Table
Symbol
Tc   
Hg   
Group Number
7   
11
12   
6
Period Number
5   
6   
Block
d block   
d block   
Element Family
Transition Metal   
Transition Metal   
CAS Number
7440268   
99+
7439976   
99+
Space Group Name
P63/mmc   
R_ 3m   
Space Group Number
194.00   
5
166.00   
6
Facts
Interesting Facts
  • Original name of Technetium was Masurium.
  • At the time of its discovery it found in sample of Molybdenum.
  
  • 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
Made by Bombarding Molybdenum with Deuterons   
Mining, Ores of Minerals   
History
  
  
Who Discovered
Emilio Segrè and Carlo Perriero   
Ancient Chinese and Indians   
Discovery
In 1937   
Before 2000 BCE   
Abundance
  
  
Abundance In Earth's Crust
Not Available   
0.05 %   
9
Uses
Uses & Benefits
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  
  • 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
NA   
Electrical Industry, Electronic Industry   
Medical Uses
NA   
Dentistry   
Other Uses
Alloys, Nuclear Research, Research Purposes   
Alloys, Mirror Manufacturing, Pharmaceutical Industry   
Biological Properties
  
  
Toxicity
Low Toxic   
Highly Toxic   
Present in Human Body
No   
Yes   
In Blood
0.00 Blood/mg dm-3   
37
0.01 Blood/mg dm-3   
23
In Bone
0.00 p.p.m.   
36
0.45 p.p.m.   
19
Physical Properties
Melting Point
2,200.00 °C   
9
Not Available   
Boiling Point
4,877.00 °C   
7
356.58 °C   
99+
Appearance
  
  
Physical State
Solid   
Liquid   
Color
Shiny Gray   
Silver   
Luster
NA   
NA   
Hardness
  
  
Speed of Sound
16,200.00 m/s   
1
1,451.40 m/s   
99+
Optical Properties
  
  
Refractive Index
Not Available   
1.00   
3
Reflectivity
Not Available   
73.00 %   
8
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
Tc   
Hg   
Isotopes
  
  
Known Isotopes
18   
21
34   
5
Electronegativity
  
  
Pauling Electronegativity
1.90   
11
2.00   
7
Sanderson Electronegativity
Not Available   
2.20   
7
Allred Rochow Electronegativity
1.36   
20
1.44   
17
Mulliken-Jaffe Electronegativity
Not Available   
1.81   
9
Allen Electronegativity
1.51   
28
1.44   
30
Electropositivity
  
  
Pauling Electropositivity
2.10   
99+
2.00   
99+
Ionization Energies
  
  
1st Energy Level
702.00 kJ/mol   
36
1,007.10 kJ/mol   
4
2nd Energy Level
1,470.00 kJ/mol   
99+
1,810.00 kJ/mol   
20
3rd Energy Level
2,850.00 kJ/mol   
33
3,300.00 kJ/mol   
20
Electrochemical Equivalent
0.52 g/amp-hr   
99+
3.74 g/amp-hr   
10
Electron Work Function
Not Available   
4.49 eV   
15
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Flammability, Ionization, Solubility   
Atomic Properties
Atomic Number
43   
99+
80   
36
Electron Configuration
[Kr] 4d5 5s2   
[Xe] 4f14 5d10 6s2   
Crystal Structure
Hexagonal Close Packed (HCP)   
Rhombohedral (RHO)   
Crystal Lattice
HCP-Crystal-Structure-of-Technetium.jpg#100   
RHO-Crystal-Structure-of-Mercury.jpg#100   
Atom
  
  
Number of Protons
43   
99+
80   
36
Number of Neutrons
55   
99+
121   
22
Number of Electrons
43   
99+
80   
36
Radius of an Atom
  
  
Atomic Radius
136.00 pm   
99+
151.00 pm   
32
Covalent Radius
147.00 pm   
37
132.00 pm   
99+
Van der Waals Radius
200.00 pm   
28
155.00 pm   
99+
Atomic Weight
98.00 amu   
99+
200.59 amu   
32
Atomic Volume
8.50 cm3/mol   
99+
14.82 cm3/mol   
35
Adjacent Atomic Numbers
  
  
Previous Element
Molybdenum
  
Gold
  
Next Element
Ruthenium
  
Thallium
  
Valence Electron Potential
180.00 (-eV)   
3
28.20 (-eV)   
99+
Lattice Constant
273.50 pm   
99+
300.50 pm   
99+
Lattice Angles
π/2, π/2, 2 π/3   
NA   
Lattice C/A Ratio
1.60   
5
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
11.00 g/cm3   
34
13.53 g/cm3   
24
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
0.00   
1
Vapor Pressure
  
  
Elasticity properties
  
  
Poisson Ratio
Not Available   
Not Available   
Other Mechanical Properties
NA   
NA   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
11.50   
24
13.53   
16
Magnetic Ordering
Paramagnetic   
Diamagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Conductor   
Resistivity
200.00 nΩ·m   
18
961.00 nΩ·m   
1
Electrical Conductivity
0.07 106/cm Ω   
30
0.01 106/cm Ω   
99+
Electron Affinity
53.00 kJ/mol   
18
0.00 kJ/mol   
40
Thermal Properties
Specific Heat
0.21 J/(kg K)   
29
0.14 J/(kg K)   
38
Molar Heat Capacity
24.27 J/mol·K   
99+
27.98 J/mol·K   
13
Thermal Conductivity
50.60 W/m·K   
30
8.30 W/m·K   
99+
Critical Temperature
Not Available   
1,750.00 K   
6
Thermal Expansion
7.10 µm/(m·K)   
99+
60.40 µm/(m·K)   
5
Enthalpy
  
  
Enthalpy of Vaporization
660.00 kJ/mol   
6
56.90 kJ/mol   
99+
Enthalpy of Fusion
23.01 kJ/mol   
9
2.29 kJ/mol   
99+
Enthalpy of Atomization
649.00 kJ/mol   
8
61.50 kJ/mol   
99+
Standard Molar Entropy
181.10 J/mol.K   
2
75.80 J/mol.K   
6
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