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Technetium
Technetium

Promethium
Promethium



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Technetium
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Promethium

Technetium Promethium Comparison

1 Periodic Table
1.1 Symbol
Tc
Pm
1.2 Group Number
7NA
Gadolinium Metal
0 17
1.3 Period Number
56
Lithium Metal
2 7
1.4 Block
d block
f block
1.5 Element Family
Transition Metal
Lanthanide
1.6 CAS Number
74402687440122
Aluminium Metal
7429905 54386242
1.7 Space Group Name
P63/mmc
Not Available
1.8 Space Group Number
194.00NA
Plutonium Metal
11 229
2 Facts
2.1 Interesting Facts
  • Original name of Technetium was Masurium.
  • At the time of its discovery it found in sample of Molybdenum.
  • Promethium metal found in Pitchblende.
  • Promethium metal is highly radioactive metal.
2.2 Sources
Made by Bombarding Molybdenum with Deuterons
Found in Minerals, Mining
2.3 History
2.3.1 Who Discovered
Emilio Segrè and Carlo Perriero
Chien Shiung Wu, Emilio Segrè, Hans Bethe
2.3.2 Discovery
In 1937
In 1942
2.4 Abundance
2.4.1 Abundance In Universe
NANA
Thallium Metal
5E-09 0.11
2.4.2 Abundance In Sun
~-9999 %~-9999 %
Beryllium Metal
1E-08 0.1
2.4.3 Abundance In Meteorites
NANA
Gold Metal
1.7E-07 22
2.4.4 Abundance In Earth's Crust
NANA
Radium Metal
9.9E-12 8.1
2.4.5 Abundance In Oceans
NANA
Protactinium Metal
2E-23 1.1
2.4.6 Abundance In Humans
NANA
Radium Metal
1E-13 1.4
3 Uses
3.1 Uses & Benefits
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  • It is used for research purpose. Very small amount of this metal is used in atomic batteries.
  • Its radioactive decay is used for a phosphor to give off light. The light emitted is converted into electricity.
3.1.1 Industrial Uses
NA
NA
3.1.2 Medical Uses
NA
NA
3.1.3 Other Uses
Alloys, Nuclear Research, Research Purposes
NA
3.2 Biological Properties
3.2.1 Toxicity
Low Toxic
Non Toxic
3.2.2 Present in Human Body
3.2.3 In Blood
0.00 Blood/mg dm-30.00 Blood/mg dm-3
Plutonium Metal
0 1970
3.2.4 In Bone
0.00 p.p.m.NA
Plutonium Metal
0 170000
4 Physical
4.1 Melting Point
2,200.00 °C1,042.00 °C
Francium Metal
27 3410
4.2 Boiling Point
4,877.00 °C3,000.00 °C
Flerovium Metal
147 5660
4.3 Appearance
4.3.1 Physical State
Solid
Solid
4.3.2 Color
Shiny Gray
Unknown
4.3.3 Luster
NA
Metallic
4.4 Hardness
4.4.1 Mohs Hardness
NANA
Cesium Metal
0.2 8.5
4.4.2 Brinell Hardness
NANA
Cesium Metal
0.14 3490
4.4.3 Vickers Hardness
NANA
Palladium Metal
121 3430
4.5 Speed of Sound
16,200.00 m/sNA
Thallium Metal
818 16200
4.6 Optical Properties
4.6.1 Refractive Index
NANA
Mercury Metal
1.000933 1.7229
4.6.2 Reflectivity
NANA
Molybdenum Metal
58 97
4.7 Allotropes
4.7.1 α Allotropes
Not Available
Not Available
4.7.2 β Allotropes
Not Available
Not Available
4.7.3 γ Allotropes
Not Available
Not Available
5 Chemical
5.1 Chemical Formula
Tc
Pm
5.2 Isotopes
5.2.1 Known Isotopes
1827
Tennessine Metal
0 38
5.3 Electronegativity
5.3.1 Pauling Electronegativity
1.90NA
Francium Metal
0.7 2.54
5.3.2 Sanderson Electronegativity
NANA
Cesium Metal
0.22 2.56
5.3.3 Allred Rochow Electronegativity
1.361.07
Cesium Metal
0.86 1.82
5.3.4 Mulliken-Jaffe Electronegativity
NANA
Cesium Metal
0.62 2.48
5.3.5 Allen Electronegativity
1.51NA
Cesium Metal
0.659 2.7
5.4 Electropositivity
5.4.1 Pauling Electropositivity
2.10NA
Gold Metal
1.46 3.3
5.5 Ionization Energies
5.5.1 1st Energy Level
702.00 kJ/mol540.00 kJ/mol
Cesium Metal
375.7 26130
5.5.2 2nd Energy Level
1,470.00 kJ/mol1,050.00 kJ/mol
Ruthenium Metal
710.2162 28750
5.5.3 3rd Energy Level
2,850.00 kJ/mol2,150.00 kJ/mol
Osmium Metal
1600 34230
5.5.4 4th Energy Level
NA3,970.00 kJ/mol
Thorium Metal
2780 37066
5.5.5 5th Energy Level
NANA
Dubnium Metal
4305.2 97510
5.5.6 6th Energy Level
NANA
Seaborgium Metal
5715.8 105800
5.5.7 7th Energy level
NANA
Bohrium Metal
7226.8 114300
5.5.8 8th Energy Level
NANA
Hassium Metal
8857.4 125300
5.5.9 9th Energy Level
NANA
Yttrium Metal
14110 134700
5.5.10 10th Energy Level
NANA
Strontium Metal
17100 144300
5.5.11 11th Energy Level
NANA
Yttrium Metal
19900 169988
5.5.12 12th Energy Level
NANA
Molybdenum Metal
22219 189368
5.5.13 13th Energy Level
NANA
Molybdenum Metal
26930 76015
5.5.14 14th Energy Level
NANA
Molybdenum Metal
29196 86450
5.5.15 15th Energy Level
NANA
Manganese Metal
41987 97510
5.5.16 16th Energy Level
NANA
Iron Metal
47206 109480
5.5.17 17th Energy Level
NANA
Cobalt Metal
52737 122200
5.5.18 18th Energy Level
NANA
Nickel Metal
58570 134810
5.5.19 19th Energy Level
NANA
Copper Metal
64702 148700
5.5.20 20th Energy Level
NANA
Molybdenum Metal
80400 171200
5.5.21 21st Energy Level
NANA
Molybdenum Metal
87000 179100
5.5.22 22nd Energy Level
NANA
Molybdenum Metal
93400 184900
5.5.23 23rd Energy Level
NANA
Molybdenum Metal
98420 198800
5.5.24 24th Energy Level
NANA
Molybdenum Metal
104400 195200
5.5.25 25th Energy Level
NANA
Molybdenum Metal
121900 121900
5.5.26 26th Energy Level
NANA
Molybdenum Metal
127700 127700
5.5.27 27th Energy Level
NANA
Molybdenum Metal
133800 133800
5.5.28 28th Energy Level
NANA
Molybdenum Metal
139800 139800
5.5.29 29th Energy Level
NANA
Molybdenum Metal
148100 148100
5.5.30 30th Energy Level
NANA
Molybdenum Metal
154500 154500
5.6 Electrochemical Equivalent
0.52 g/amp-hr1.80 g/amp-hr
Beryllium Metal
0.16812 8.3209
5.7 Electron Work Function
NANA
Cesium Metal
2.14 5.65
5.8 Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility
Ionization, Radioactive Isotopes, Solubility
6 Atomic
6.1 Atomic Number
4361
Lithium Metal
3 117
6.2 Electron Configuration
[Kr] 4d5 5s2
[Xe] 4f5 6s2
6.3 Crystal Structure
Hexagonal Close Packed (HCP)
Double Hexagonal Close Packed (DHCP)
6.3.1 Crystal Lattice
6.4 Atom
6.4.1 Number of Protons
4361
Lithium Metal
3 117
6.4.2 Number of Neutrons
5584
Lithium Metal
4 184
6.4.3 Number of Electrons
4361
Lithium Metal
3 117
6.5 Radius of an Atom
6.5.1 Atomic Radius
136.00 pm183.00 pm
Beryllium Metal
112 265
6.5.2 Covalent Radius
147.00 pm199.00 pm
Beryllium Metal
96 260
6.5.3 Van der Waals Radius
200.00 pm236.00 pm
Zinc Metal
139 348
6.6 Atomic Weight
98.00 amu145.00 amu
Lithium Metal
6.94 294
6.7 Atomic Volume
8.50 cm3/mol22.39 cm3/mol
Manganese Metal
1.39 71.07
6.8 Adjacent Atomic Numbers
6.8.1 Previous Element
6.8.2 Next Element
6.9 Valence Electron Potential
180.00 (-eV)44.10 (-eV)
Francium Metal
8 392.42
6.10 Lattice Constant
273.50 pmNA
Beryllium Metal
228.58 891.25
6.11 Lattice Angles
π/2, π/2, 2 π/3
Unknown
6.12 Lattice C/A Ratio
1.60NA
Beryllium Metal
1.567 1.886
7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
11.00 g/cm37.26 g/cm3
Lithium Metal
0.534 40.7
7.1.2 Density When Liquid (at m.p.)
NANA
Lithium Metal
0.512 20
7.2 Tensile Strength
NANA
Indium Metal
2.5 11000
7.3 Viscosity
NANA
Mercury Metal
0.001526 0.001526
7.4 Vapor Pressure
7.4.1 Vapor Pressure at 1000 K
NANA
Cerium Metal
2.47E-11 121
7.4.2 Vapor Pressure at 2000 K
NANA
Tungsten Metal
2.62E-10 774
7.5 Elasticity properties
7.5.1 Shear Modulus
NA18.00 GPa
Potassium Metal
1.3 222
7.5.2 Bulk Modulus
NA33.00 GPa
Cesium Metal
1.6 462
7.5.3 Young's Modulus
NA46.00 GPa
Cesium Metal
1.7 528
7.6 Poisson Ratio
NA0.28
Beryllium Metal
0.032 0.47
7.7 Other Mechanical Properties
NA
NA
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
11.507.26
Lithium Metal
0.53 4500
8.1.2 Magnetic Ordering
Paramagnetic
Paramagnetic
8.1.3 Permeability
NANA
Bismuth Metal
1.25643E-06 0.0063
8.1.4 Susceptibility
NANA
Bismuth Metal
-0.000166 200000
8.2 Electrical Properties
8.2.1 Electrical Property
Conductor
Conductor
8.2.2 Resistivity
200.00 nΩ·m0.75 nΩ·m
Thallium Metal
0.18 961
8.2.3 Electrical Conductivity
0.07 106/cm ΩNA
Plutonium Metal
0.00666 0.63
8.2.4 Electron Affinity
53.00 kJ/mol50.00 kJ/mol
Mercury Metal
0 222.8
9 Thermal
9.1 Specific Heat
0.21 J/(kg K)0.18 J/(kg K)
Americium Metal
0.11 3.6
9.2 Molar Heat Capacity
24.27 J/mol·KNA
Beryllium Metal
16.443 62.7
9.3 Thermal Conductivity
50.60 W/m·K17.90 W/m·K
Neptunium Metal
6.3 429
9.4 Critical Temperature
NANA
Ytterbium Metal
26.3 3223
9.5 Thermal Expansion
7.10 µm/(m·K)9.00 µm/(m·K)
Tungsten Metal
4.5 97
9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
660.00 kJ/molNA
Zinc Metal
7.32 799.1
9.6.2 Enthalpy of Fusion
23.01 kJ/mol7.50 kJ/mol
Cesium Metal
2.1 35.23
9.6.3 Enthalpy of Atomization
649.00 kJ/mol310.00 kJ/mol
Mercury Metal
61.5 837
9.7 Standard Molar Entropy
181.10 J/mol.KNA
Beryllium Metal
9.5 198.1