Symbol
Tc
Group Number
7
Rank: 11 (Overall)
0
17
👆🏻
Period Number
5
Rank: 3 (Overall)
2
7
👆🏻
Block
d block
Element Family
Transition Metal
CAS Number
7440268
Rank: 54 (Overall)
7429905
54386242
👆🏻
Space Group Name
P63/mmc
Space Group Number
194.00
Rank: 7 (Overall)
11
276
👆🏻
Interesting Facts
- 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
History
Who Discovered
Emilio Segrè and Carlo Perriero
Discovery
In 1937
Abundance
Abundance In Universe
0.00 %
Rank: 40 (Overall)
0
0.11
👆🏻
Abundance In Sun
0.00 %
Rank: 18 (Overall)
0
0.1
👆🏻
Abundance In Meteorites
-
0
22
👆🏻
Abundance In Earth's Crust
0.00 %
Rank: 60 (Overall)
1E-37
8.1
👆🏻
Abundance In Oceans
-
0
1.1
👆🏻
Abundance In Humans
-
0
1.4
👆🏻
Uses & Benefits
- Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
Industrial Uses
-
Medical Uses
-
Other Uses
Alloys, Nuclear Research, Research Purposes
Biological Properties
Toxicity
Low Toxic
Present in Human Body
✔
✘
60% - Transition Metals Metals
In Blood
0.00 Blood/mg dm-3
Rank: 40 (Overall)
0
1970
👆🏻
In Bone
0.00 p.p.m.
Rank: 41 (Overall)
0
170000
👆🏻
Melting Point
2,200.00 °C
Rank: 9 (Overall)
-38.83
3410
👆🏻
Boiling Point
4,877.00 °C
Rank: 7 (Overall)
0
5660
👆🏻
Appearance
Physical State
Solid
Color
Shiny Gray
Luster
-
Hardness
Mohs Hardness
2.25
Rank: 16 (Overall)
0.2
8.5
👆🏻
Brinell Hardness
550.00 MPa
Rank: 27 (Overall)
0.14
3490
👆🏻
Vickers Hardness
500.00 MPa
Rank: 35 (Overall)
0
3920
👆🏻
Speed of Sound
16,200.00 m/s
Rank: 1 (Overall)
818
16200
👆🏻
Optical Properties
Refractive Index
1.90
Rank: 18 (Overall)
0.155
3.41
👆🏻
Reflectivity
35.00 %
Rank: 34 (Overall)
5
97
👆🏻
Allotropes
✔
✘
6% - Transition Metals Metals
α Allotropes
-
β Allotropes
-
γ Allotropes
-
Chemical Formula
Tc
Isotopes
Known Isotopes
18
Rank: 21 (Overall)
0
38
👆🏻
Electronegativity
Pauling Electronegativity
1.90
Rank: 12 (Overall)
0
2.6
👆🏻
Sanderson Electronegativity
1.90
Rank: 13 (Overall)
0.22
2.56
👆🏻
Allred Rochow Electronegativity
1.36
Rank: 21 (Overall)
0.86
1.9
👆🏻
Mulliken-Jaffe Electronegativity
1.90
Rank: 13 (Overall)
0.62
2.48
👆🏻
Allen Electronegativity
1.51
Rank: 31 (Overall)
0.659
2.7
👆🏻
Electropositivity
Pauling Electropositivity
2.10
Rank: 43 (Overall)
1.46
3.3
👆🏻
Ionization Energies
1st Energy Level
702.00 kJ/mol
Rank: 36 (Overall)
375.7
26130
👆🏻
2nd Energy Level
1,470.00 kJ/mol
Rank: 42 (Overall)
392.8
28750
👆🏻
3rd Energy Level
2,850.00 kJ/mol
Rank: 34 (Overall)
392.8
34230
👆🏻
4th Energy Level
7,020.00 kJ/mol
Rank: 14 (Overall)
375.7
37066
👆🏻
5th Energy Level
7,020.00 kJ/mol
Rank: 28 (Overall)
392
97510
👆🏻
6th Energy Level
7,020.00 kJ/mol
Rank: 46 (Overall)
1007
105800
👆🏻
7th Energy level
4,700.00 kJ/mol
Rank: 80 (Overall)
1007
114300
👆🏻
8th Energy Level
4,700.00 kJ/mol
Rank: 78 (Overall)
730
125300
👆🏻
9th Energy Level
7,020.00 kJ/mol
Rank: 35 (Overall)
1007
134700
👆🏻
10th Energy Level
7,020.00 kJ/mol
Rank: 39 (Overall)
392
144300
👆🏻
11th Energy Level
7,020.00 kJ/mol
Rank: 37 (Overall)
392
169988
👆🏻
12th Energy Level
7,020.00 kJ/mol
Rank: 55 (Overall)
0
189368
👆🏻
13th Energy Level
7,020.00 kJ/mol
Rank: 33 (Overall)
1007
76015
👆🏻
14th Energy Level
7,020.00 kJ/mol
Rank: 23 (Overall)
380
86450
👆🏻
15th Energy Level
70,200.00 kJ/mol
Rank: 29 (Overall)
33000
100700
👆🏻
16th Energy Level
70,200.00 kJ/mol
Rank: 24 (Overall)
375.7
109480
👆🏻
17th Energy Level
702.50 kJ/mol
Rank: 44 (Overall)
375.7
122200
👆🏻
18th Energy Level
7,020.00 kJ/mol
Rank: 35 (Overall)
0
134810
👆🏻
19th Energy Level
702.00 kJ/mol
Rank: 41 (Overall)
375.7
148700
👆🏻
20th Energy Level
702.00 kJ/mol
Rank: 35 (Overall)
0
171200
👆🏻
21st Energy Level
702.00 kJ/mol
Rank: 53 (Overall)
375.7
179100
👆🏻
22nd Energy Level
702.00 kJ/mol
Rank: 29 (Overall)
330
184900
👆🏻
23rd Energy Level
702.00 kJ/mol
Rank: 53 (Overall)
357.6
198800
👆🏻
24th Energy Level
702.50 kJ/mol
Rank: 28 (Overall)
297.3
195200
👆🏻
25th Energy Level
702.00 kJ/mol
Rank: 30 (Overall)
0
121900
👆🏻
26th Energy Level
702.00 kJ/mol
Rank: 29 (Overall)
357.6
127700
👆🏻
27th Energy Level
702.00 kJ/mol
Rank: 30 (Overall)
0
133800
👆🏻
28th Energy Level
702.00 kJ/mol
Rank: 35 (Overall)
297.3
139800
👆🏻
29th Energy Level
702.00 kJ/mol
Rank: 36 (Overall)
0
148100
👆🏻
30th Energy Level
702.00 kJ/mol
Rank: 30 (Overall)
0
154500
👆🏻
Electrochemical Equivalent
0.52 g/amp-hr
Rank: 72 (Overall)
0.16812
8.3209
👆🏻
Electron Work Function
4.90 eV
Rank: 12 (Overall)
2.14
6
👆🏻
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility
Atomic Number
43
Rank: 69 (Overall)
3
117
👆🏻
Electron Configuration
[Kr] 4d5 5s2
Crystal Structure
Hexagonal Close Packed (HCP)
Crystal Lattice
Atom
Number of Protons
43
Rank: 68 (Overall)
3
117
👆🏻
Number of Neutrons
55
Rank: 52 (Overall)
4
285
👆🏻
Number of Electrons
43
Rank: 68 (Overall)
3
117
👆🏻
Radius of an Atom
Atomic Radius
136.00 pm
Rank: 43 (Overall)
0
348
👆🏻
Covalent Radius
147.00 pm
Rank: 39 (Overall)
0
260
👆🏻
Van der Waals Radius
200.00 pm
Rank: 35 (Overall)
0
348
👆🏻
Atomic Weight
98.00 amu
Rank: 63 (Overall)
6.94
294
👆🏻
Atomic Volume
8.50 cm3/mol
Rank: 75 (Overall)
1.39
71.07
👆🏻
Adjacent Atomic Numbers
Previous Element
Next Element
Valence Electron Potential
180.00 (-eV)
Rank: 3 (Overall)
0
392.42
👆🏻
Lattice Constant
273.50 pm
Rank: 72 (Overall)
0
891.25
👆🏻
Lattice Angles
π/2, π/2, 2 π/3
Lattice C/A Ratio
1.60
Rank: 21 (Overall)
0.423
1.9
👆🏻
Density
Density At Room Temperature
11.00 g/cm3
Rank: 36 (Overall)
0.534
40.7
👆🏻
Density When Liquid (at m.p.)
11.00 g/cm3
Rank: 34 (Overall)
0.512
41
👆🏻
Tensile Strength
50.00 MPa
Rank: 38 (Overall)
0.1
11000
👆🏻
Viscosity
0.00
Rank: 25 (Overall)
1.5E-05
0.0035
👆🏻
Vapor Pressure
Vapor Pressure at 1000 K
0.00 (Pa)
Rank: 37 (Overall)
0
121
👆🏻
Vapor Pressure at 2000 K
0.00 (Pa)
Rank: 41 (Overall)
0
774
👆🏻
Elasticity properties
Shear Modulus
27.00 GPa
Rank: 34 (Overall)
1.3
222
👆🏻
Bulk Modulus
100.00 GPa
Rank: 16 (Overall)
0
462
👆🏻
Young's Modulus
50.00 GPa
Rank: 39 (Overall)
0
528
👆🏻
Poisson Ratio
0.38
Rank: 6 (Overall)
0.032
0.47
👆🏻
Other Mechanical Properties
-
Magnetic Characteristics
Specific Gravity
11.50
Rank: 37 (Overall)
0.53
4500
👆🏻
Magnetic Ordering
Paramagnetic
Permeability
0.00 H/m
Rank: 17 (Overall)
1.25643E-06
0.0063
👆🏻
Susceptibility
0.00
Rank: 24 (Overall)
-0.000166
200000
👆🏻
Electrical Properties
Electrical Property
Conductor
Resistivity
200.00 nΩ·m
Rank: 18 (Overall)
0.1
961
👆🏻
Electrical Conductivity
0.07 106/cm Ω
Rank: 35 (Overall)
0
0.63
👆🏻
Electron Affinity
53.00 kJ/mol
Rank: 23 (Overall)
0
222.8
👆🏻
Specific Heat
0.21 J/(kg K)
Rank: 30 (Overall)
0.1
3.6
👆🏻
Molar Heat Capacity
24.27 J/mol·K
Rank: 61 (Overall)
13.1
62.7
👆🏻
Thermal Conductivity
50.60 W/m·K
Rank: 30 (Overall)
0
429
👆🏻
Critical Temperature
2,150.00 K
Rank: 16 (Overall)
26.3
3695
👆🏻
Thermal Expansion
7.10 µm/(m·K)
Rank: 64 (Overall)
4.5
97
👆🏻
Enthalpy
Enthalpy of Vaporization
660.00 kJ/mol
Rank: 7 (Overall)
7.32
799.1
👆🏻
Enthalpy of Fusion
23.01 kJ/mol
Rank: 9 (Overall)
2.1
35.23
👆🏻
Enthalpy of Atomization
649.00 kJ/mol
Rank: 9 (Overall)
61.5
837
👆🏻
Standard Molar Entropy
181.10 J/mol.K
Rank: 2 (Overall)
9.5
198.1
👆🏻