Technetium vs Zinc
Periodic Table
Symbol
Tc
Zn
Group Number
7
11
12
6
Period Number
5
4
Block
d block
d block
Element Family
Transition Metal
Transition Metal
CAS Number
7440268
99+
7440666
24
Space Group Name
P63/mmc
P63/mmc
Space Group Number
194.00
5
194.00
5
Facts
Interesting Facts
- Original name of Technetium was Masurium.
- At the time of its discovery it found in sample of Molybdenum.
- Zinc metal found (obtain) in many forms like granules, foil, dust and in a powder form.
- The leading producers of Zinc metal are Australia, Canada, China, U.S.A and Peru.
Sources
Made by Bombarding Molybdenum with Deuterons
Earth's crust, Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Emilio Segrè and Carlo Perriero
Indian metallurgists
Discovery
In 1937
Before 1000 BCE
Abundance
Abundance In Universe
Not Available
3 * 10-5 %
11
Abundance In Sun
~-9999 %
~0.0002 %
10
Abundance In Meteorites
Not Available
0.02 %
12
Abundance In Earth's Crust
Not Available
0.01 %
16
Abundance In Oceans
Not Available
0.00 %
10
Abundance In Humans
Not Available
0.00 %
6
Uses
Uses & Benefits
- Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
- It is mainly used for Galvanizing other metals.
- It is also used for manufacturing die-casting and it is very essential for automobile industry.
Industrial Uses
NA
Electrical Industry, Electronic Industry
Medical Uses
NA
Pharmaceutical Industry
Other Uses
Alloys, Nuclear Research, Research Purposes
Alloys
Biological Properties
Toxicity
Low Toxic
Highly Toxic
Present in Human Body
No
Yes
In Blood
0.00 Blood/mg dm-3
37
7.00 Blood/mg dm-3
6
In Bone
0.00 p.p.m.
36
170.00 p.p.m.
6
Physical Properties
Melting Point
2,200.00 °C
9
419.58 °C
99+
Boiling Point
4,877.00 °C
7
907.00 °C
99+
Appearance
Physical State
Solid
Solid
Color
Shiny Gray
Silvery Gray
Luster
NA
Metallic
Hardness
Mohs Hardness
Not Available
2.50
14
Brinell Hardness
Not Available
327.00 MPa
32
Speed of Sound
16,200.00 m/s
1
3,850.00 m/s
18
Optical Properties
Refractive Index
Not Available
1.00
2
Reflectivity
Not Available
80.00 %
5
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
Zn
Isotopes
Known Isotopes
18
21
25
14
Electronegativity
Pauling Electronegativity
1.90
11
1.65
19
Sanderson Electronegativity
Not Available
2.23
6
Allred Rochow Electronegativity
1.36
20
1.66
7
Mulliken-Jaffe Electronegativity
Not Available
1.65
11
Allen Electronegativity
1.51
28
1.59
22
Electropositivity
Pauling Electropositivity
2.10
99+
2.35
35
Ionization Energies
1st Energy Level
702.00 kJ/mol
36
906.40 kJ/mol
6
2nd Energy Level
1,470.00 kJ/mol
99+
1,733.30 kJ/mol
27
3rd Energy Level
2,850.00 kJ/mol
33
3,833.00 kJ/mol
12
4th Energy Level
Not Available
5,731.00 kJ/mol
11
5th Energy Level
Not Available
7,970.00 kJ/mol
9
6th Energy Level
Not Available
10,400.00 kJ/mol
9
7th Energy level
Not Available
12,900.00 kJ/mol
9
8th Energy Level
Not Available
16,800.00 kJ/mol
6
9th Energy Level
Not Available
19,600.00 kJ/mol
8
10th Energy Level
Not Available
23,000.00 kJ/mol
10
11th Energy Level
Not Available
26,400.00 kJ/mol
11
12th Energy Level
Not Available
29,990.00 kJ/mol
11
13th Energy Level
Not Available
40,490.00 kJ/mol
5
14th Energy Level
Not Available
43,800.00 kJ/mol
6
15th Energy Level
Not Available
47,300.00 kJ/mol
8
16th Energy Level
Not Available
52,300.00 kJ/mol
9
17th Energy Level
Not Available
55,900.00 kJ/mol
10
18th Energy Level
Not Available
59,700.00 kJ/mol
11
19th Energy Level
Not Available
67,300.00 kJ/mol
10
20th Energy Level
Not Available
171,200.00 kJ/mol
1
21st Energy Level
Not Available
179,100.00 kJ/mol
1
Electrochemical Equivalent
0.52 g/amp-hr
99+
1.22 g/amp-hr
99+
Electron Work Function
Not Available
4.33 eV
17
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility
Anti Corrosion, Chemical Stability, Ionization, Radioactive Isotopes
Atomic Properties
Atomic Number
43
99+
30
99+
Electron Configuration
[Kr] 4d5 5s2
[Ar] 3d10 4s2
Crystal Structure
Hexagonal Close Packed (HCP)
Hexagonal Close Packed (HCP)
Crystal Lattice
HCP-Crystal-Structure-of-Technetium.jpg#100
HCP-Crystal-Structure-of-Zinc.jpg#100
Atom
Number of Protons
43
99+
30
99+
Number of Neutrons
55
99+
35
99+
Number of Electrons
43
99+
30
99+
Radius of an Atom
Atomic Radius
136.00 pm
99+
134.00 pm
99+
Covalent Radius
147.00 pm
37
122.00 pm
99+
Van der Waals Radius
200.00 pm
28
139.00 pm
99+
Atomic Weight
98.00 amu
99+
65.38 amu
99+
Atomic Volume
8.50 cm3/mol
99+
9.20 cm3/mol
99+
Adjacent Atomic Numbers
Valence Electron Potential
180.00 (-eV)
3
38.90 (-eV)
99+
Lattice Constant
273.50 pm
99+
266.49 pm
99+
Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, 2 π/3
Lattice C/A Ratio
1.60
5
Not Available
Mechanical Properties
Density
Density At Room Temperature
11.00 g/cm3
34
7.14 g/cm3
99+
Density When Liquid (at m.p.)
Not Available
6.57 g/cm3
37
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Elasticity properties
Shear Modulus
Not Available
43.00 GPa
18
Bulk Modulus
Not Available
70.00 GPa
19
Young's Modulus
Not Available
108.00 GPa
19
Poisson Ratio
Not Available
0.25
24
Other Mechanical Properties
NA
NA
Magnetic Properties
Magnetic Characteristics
Specific Gravity
11.50
24
6.90
99+
Magnetic Ordering
Paramagnetic
Diamagnetic
Electrical Properties
Electrical Property
Conductor
Conductor
Resistivity
200.00 nΩ·m
18
59.00 nΩ·m
40
Electrical Conductivity
0.07 106/cm Ω
30
0.17 106/cm Ω
12
Electron Affinity
53.00 kJ/mol
18
0.00 kJ/mol
40
Thermal Properties
Specific Heat
0.21 J/(kg K)
29
0.39 J/(kg K)
14
Molar Heat Capacity
24.27 J/mol·K
99+
25.47 J/mol·K
39
Thermal Conductivity
50.60 W/m·K
30
116.00 W/m·K
14
Critical Temperature
Not Available
Not Available
Thermal Expansion
7.10 µm/(m·K)
99+
30.20 µm/(m·K)
11
Enthalpy
Enthalpy of Vaporization
660.00 kJ/mol
6
7.32 kJ/mol
99+
Enthalpy of Fusion
23.01 kJ/mol
9
7.32 kJ/mol
99+
Enthalpy of Atomization
649.00 kJ/mol
8
129.70 kJ/mol
99+
Standard Molar Entropy
181.10 J/mol.K
2
41.60 J/mol.K
36
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