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Mercury Technetium Comparison

Mercury
Technetium
Technetium Mercury comparison


Periodic Table
Symbol
Hg  
Tc  
Group Number
12  
6
7  
11
Period Number
6  
5  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
7439976  
99+
7440268  
99+
Space Group Name
R_ 3m  
P63/mmc  
Space Group Number
166.00  
9
194.00  
7
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.
  
  • Original name of Technetium was Masurium.
  • At the time of its discovery it found in sample of Molybdenum.
  
Sources
Mining, Ores of Minerals  
Made by Bombarding Molybdenum with Deuterons  
History
  
  
Who Discovered
Ancient Chinese and Indians  
Emilio Segrè and Carlo Perriero  
Discovery
Before 2000 BCE  
In 1937  
Abundance
  
  
Abundance In Universe
0.09 %  
2
0.00 %  
40
Abundance In Sun
0.00 %  
30
0.00 %  
18
Abundance In Meteorites
0.00 %  
99+
-  
Abundance In Earth's Crust
0.05 %  
9
0.00 %  
99+
Abundance In Oceans
-  
-  
Abundance In Humans
0.00 %  
24
-  
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.
  
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  
Industrial Uses
Electrical Industry, Electronic Industry  
-  
Medical Uses
Dentistry  
-  
Other Uses
Alloys, Mirror Manufacturing, Pharmaceutical Industry  
Alloys, Nuclear Research, Research Purposes  
Biological Properties
  
  
Toxicity
Highly Toxic  
Low Toxic  
Present in Human Body
Yes  
No  
In Blood
0.01 Blood/mg dm-3  
23
0.00 Blood/mg dm-3  
40
In Bone
0.45 p.p.m.  
23
0.00 p.p.m.  
99+
Physical
Melting Point
-38.83 °C  
99+
2,200.00 °C  
9
Boiling Point
356.58 °C  
99+
4,877.00 °C  
7
Appearance
  
  
Physical State
Liquid  
Solid  
Color
Silver  
Shiny Gray  
Luster
-  
-  
Hardness
  
  
Mohs Hardness
1.50  
19
2.25  
16
Brinell Hardness
5.00 MPa  
99+
550.00 MPa  
27
Vickers Hardness
0.00 MPa  
99+
500.00 MPa  
35
Speed of Sound
1,451.40 m/s  
99+
16,200.00 m/s  
1
Optical Properties
  
  
Refractive Index
1.00  
99+
1.90  
18
Reflectivity
73.00 %  
10
35.00 %  
34
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Hg  
Tc  
Isotopes
  
  
Known Isotopes
34  
5
18  
21
Electronegativity
  
  
Pauling Electronegativity
2.00  
8
1.90  
12
Sanderson Electronegativity
2.20  
8
1.90  
13
Allred Rochow Electronegativity
1.44  
18
1.36  
21
Mulliken-Jaffe Electronegativity
1.81  
17
1.90  
13
Allen Electronegativity
1.44  
34
1.51  
31
Electropositivity
  
  
Pauling Electropositivity
2.00  
99+
2.10  
99+
Ionization Energies
  
  
1st Energy Level
1,007.10 kJ/mol  
4
702.00 kJ/mol  
36
2nd Energy Level
1,810.00 kJ/mol  
21
1,470.00 kJ/mol  
99+
3rd Energy Level
3,300.00 kJ/mol  
20
2,850.00 kJ/mol  
34
4th Energy Level
1,007.10 kJ/mol  
99+
7,020.00 kJ/mol  
14
5th Energy Level
1,007.00 kJ/mol  
99+
7,020.00 kJ/mol  
28
6th Energy Level
1,007.00 kJ/mol  
99+
7,020.00 kJ/mol  
99+
7th Energy level
1,007.00 kJ/mol  
99+
4,700.00 kJ/mol  
99+
8th Energy Level
1,007.00 kJ/mol  
99+
4,700.00 kJ/mol  
99+
9th Energy Level
1,007.00 kJ/mol  
99+
7,020.00 kJ/mol  
35
10th Energy Level
1,007.00 kJ/mol  
99+
7,020.00 kJ/mol  
39
11th Energy Level
1,007.00 kJ/mol  
99+
7,020.00 kJ/mol  
37
12th Energy Level
1,007.00 kJ/mol  
99+
7,020.00 kJ/mol  
99+
13th Energy Level
1,007.00 kJ/mol  
99+
7,020.00 kJ/mol  
33
14th Energy Level
1,007.00 kJ/mol  
99+
7,020.00 kJ/mol  
23
15th Energy Level
100,700.00 kJ/mol  
1
70,200.00 kJ/mol  
29
16th Energy Level
1,007.00 kJ/mol  
99+
70,200.00 kJ/mol  
24
17th Energy Level
1,007.00 kJ/mol  
24
702.50 kJ/mol  
99+
18th Energy Level
1,007.00 kJ/mol  
99+
7,020.00 kJ/mol  
35
19th Energy Level
1,007.10 kJ/mol  
20
702.00 kJ/mol  
99+
20th Energy Level
1,007.00 kJ/mol  
11
702.00 kJ/mol  
35
21st Energy Level
1,007.00 kJ/mol  
33
702.00 kJ/mol  
99+
22nd Energy Level
1,007.00 kJ/mol  
8
702.00 kJ/mol  
29
23rd Energy Level
1,007.00 kJ/mol  
36
702.00 kJ/mol  
99+
24th Energy Level
1,007.10 kJ/mol  
3
702.50 kJ/mol  
28
25th Energy Level
1,007.10 kJ/mol  
3
702.00 kJ/mol  
30
26th Energy Level
1,007.10 kJ/mol  
3
702.00 kJ/mol  
29
27th Energy Level
1,007.10 kJ/mol  
2
702.00 kJ/mol  
30
28th Energy Level
1,007.10 kJ/mol  
5
702.00 kJ/mol  
35
29th Energy Level
1,007.10 kJ/mol  
6
702.00 kJ/mol  
36
30th Energy Level
1,007.10 kJ/mol  
3
702.00 kJ/mol  
30
Electrochemical Equivalent
3.74 g/amp-hr  
10
0.52 g/amp-hr  
99+
Electron Work Function
4.49 eV  
20
4.90 eV  
12
Other Chemical Properties
Flammability, Ionization, Solubility  
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Atomic
Atomic Number
80  
36
43  
99+
Electron Configuration
[Xe] 4f14 5d10 6s2  
[Kr] 4d5 5s2  
Crystal Structure
Rhombohedral (RHO)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
RHO-Crystal-Structure-of-Mercury.jpg#100  
HCP-Crystal-Structure-of-Technetium.jpg#100  
Atom
  
  
Number of Protons
80  
36
43  
99+
Number of Neutrons
121  
23
55  
99+
Number of Electrons
80  
36
43  
99+
Radius of an Atom
  
  
Atomic Radius
151.00 pm  
34
136.00 pm  
99+
Covalent Radius
132.00 pm  
99+
147.00 pm  
39
Van der Waals Radius
155.00 pm  
99+
200.00 pm  
35
Atomic Weight
200.59 amu  
32
98.00 amu  
99+
Atomic Volume
14.82 cm3/mol  
99+
8.50 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Gold
  
Molybdenum
  
Next Element
Thallium
  
Ruthenium
  
Valence Electron Potential
28.20 (-eV)  
99+
180.00 (-eV)  
3
Lattice Constant
300.50 pm  
99+
273.50 pm  
99+
Lattice Angles
-  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
0.42  
99+
1.60  
21
Mechanical
Density
  
  
Density At Room Temperature
13.53 g/cm3  
25
11.00 g/cm3  
36
Density When Liquid (at m.p.)
13.55 g/cm3  
27
11.00 g/cm3  
34
Tensile Strength
15.00 MPa  
99+
50.00 MPa  
38
Viscosity
0.00  
4
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
22
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
99+
0.00 (Pa)  
99+
Elasticity properties
  
  
Shear Modulus
30.00 GPa  
27
27.00 GPa  
34
Bulk Modulus
25.00 GPa  
99+
100.00 GPa  
16
Young's Modulus
45.00 GPa  
99+
50.00 GPa  
39
Poisson Ratio
0.44  
3
0.38  
6
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
13.53  
27
11.50  
37
Magnetic Ordering
Diamagnetic  
Paramagnetic  
Permeability
0.00 H/m  
10
0.00 H/m  
17
Susceptibility
0.00  
20
0.00  
24
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
961.00 nΩ·m  
1
200.00 nΩ·m  
18
Electrical Conductivity
0.01 106/cm Ω  
99+
0.07 106/cm Ω  
35
Electron Affinity
0.00 kJ/mol  
99+
53.00 kJ/mol  
23
Thermal
Specific Heat
0.14 J/(kg K)  
39
0.21 J/(kg K)  
30
Molar Heat Capacity
27.98 J/mol·K  
16
24.27 J/mol·K  
99+
Thermal Conductivity
8.30 W/m·K  
99+
50.60 W/m·K  
30
Critical Temperature
1,750.00 K  
33
2,150.00 K  
16
Thermal Expansion
60.40 µm/(m·K)  
5
7.10 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
56.90 kJ/mol  
99+
660.00 kJ/mol  
7
Enthalpy of Fusion
2.29 kJ/mol  
99+
23.01 kJ/mol  
9
Enthalpy of Atomization
61.50 kJ/mol  
99+
649.00 kJ/mol  
9
Standard Molar Entropy
75.80 J/mol.K  
6
181.10 J/mol.K  
2
Summary >>
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