Technetium vs Technetium
Periodic Table
Symbol
Tc
Tc
Group Number
7
11
7
11
Period Number
5
5
Block
d block
d block
Element Family
Transition Metal
Transition Metal
CAS Number
7440268
99+
7440268
99+
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.
- Original name of Technetium was Masurium.
- At the time of its discovery it found in sample of Molybdenum.
Sources
Made by Bombarding Molybdenum with Deuterons
Made by Bombarding Molybdenum with Deuterons
History
Who Discovered
Emilio Segrè and Carlo Perriero
Emilio Segrè and Carlo Perriero
Discovery
In 1937
In 1937
Abundance
Uses
Uses & Benefits
- Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
- Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
Industrial Uses
NA
NA
Medical Uses
NA
NA
Other Uses
Alloys, Nuclear Research, Research Purposes
Alloys, Nuclear Research, Research Purposes
Biological Properties
Toxicity
Low Toxic
Low Toxic
Present in Human Body
No
No
In Blood
0.00 Blood/mg dm-3
37
0.00 Blood/mg dm-3
37
In Bone
0.00 p.p.m.
36
0.00 p.p.m.
36
Physical Properties
Melting Point
2,200.00 °C
9
2,200.00 °C
9
Boiling Point
4,877.00 °C
7
4,877.00 °C
7
Appearance
Physical State
Solid
Solid
Color
Shiny Gray
Shiny Gray
Luster
NA
NA
Hardness
Speed of Sound
16,200.00 m/s
1
16,200.00 m/s
1
Optical Properties
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
Tc
Isotopes
Known Isotopes
18
21
18
21
Electronegativity
Pauling Electronegativity
1.90
11
1.90
11
Allred Rochow Electronegativity
1.36
20
1.36
20
Allen Electronegativity
1.51
28
1.51
28
Electropositivity
Pauling Electropositivity
2.10
99+
2.10
99+
Ionization Energies
1st Energy Level
702.00 kJ/mol
36
702.00 kJ/mol
36
2nd Energy Level
1,470.00 kJ/mol
99+
1,470.00 kJ/mol
99+
3rd Energy Level
2,850.00 kJ/mol
33
2,850.00 kJ/mol
33
Electrochemical Equivalent
0.52 g/amp-hr
99+
0.52 g/amp-hr
99+
Electron Work Function
Not Available
Not Available
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility
Atomic Properties
Atomic Number
43
99+
43
99+
Electron Configuration
[Kr] 4d5 5s2
[Kr] 4d5 5s2
Crystal Structure
Hexagonal Close Packed (HCP)
Hexagonal Close Packed (HCP)
Crystal Lattice
HCP-Crystal-Structure-of-Technetium.jpg#100
HCP-Crystal-Structure-of-Technetium.jpg#100
Atom
Number of Protons
43
99+
43
99+
Number of Neutrons
55
99+
55
99+
Number of Electrons
43
99+
43
99+
Radius of an Atom
Atomic Radius
136.00 pm
99+
136.00 pm
99+
Covalent Radius
147.00 pm
37
147.00 pm
37
Van der Waals Radius
200.00 pm
28
200.00 pm
28
Atomic Weight
98.00 amu
99+
98.00 amu
99+
Atomic Volume
8.50 cm3/mol
99+
8.50 cm3/mol
99+
Adjacent Atomic Numbers
Valence Electron Potential
180.00 (-eV)
3
180.00 (-eV)
3
Lattice Constant
273.50 pm
99+
273.50 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
1.60
5
Mechanical Properties
Density
Density At Room Temperature
11.00 g/cm3
34
11.00 g/cm3
34
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Elasticity properties
Poisson Ratio
Not Available
Not Available
Other Mechanical Properties
NA
NA
Magnetic Properties
Magnetic Characteristics
Specific Gravity
11.50
24
11.50
24
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Conductor
Conductor
Resistivity
200.00 nΩ·m
18
200.00 nΩ·m
18
Electrical Conductivity
0.07 106/cm Ω
30
0.07 106/cm Ω
30
Electron Affinity
53.00 kJ/mol
18
53.00 kJ/mol
18
Thermal Properties
Specific Heat
0.21 J/(kg K)
29
0.21 J/(kg K)
29
Molar Heat Capacity
24.27 J/mol·K
99+
24.27 J/mol·K
99+
Thermal Conductivity
50.60 W/m·K
30
50.60 W/m·K
30
Critical Temperature
Not Available
Not Available
Thermal Expansion
7.10 µm/(m·K)
99+
7.10 µm/(m·K)
99+
Enthalpy
Enthalpy of Vaporization
660.00 kJ/mol
6
660.00 kJ/mol
6
Enthalpy of Fusion
23.01 kJ/mol
9
23.01 kJ/mol
9
Enthalpy of Atomization
649.00 kJ/mol
8
649.00 kJ/mol
8
Standard Molar Entropy
181.10 J/mol.K
2
181.10 J/mol.K
2
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