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Technetium
Technetium

Curium
Curium



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Technetium
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Technetium vs Curium

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1 Periodic Table
1.1 Symbol
Tc
Cm
1.2 Group Number
7NA
Gadolinium
0 17
1.3 Period Number
57
Lithium
2 7
1.4 Block
d block
f block
1.5 Element Family
Transition Metal
Actinide
1.6 CAS Number
74402687440519
Aluminium
7429905 54386242
1.7 Space Group Name
P63/mmc
Not Available
1.8 Space Group Number
194.00NA
Plutonium
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.
  • Curium metal does not occur free in nature.
  • Curium metal is a synthetically produced metal.
2.2 Sources
Made by Bombarding Molybdenum with Deuterons
Bombarding Plutonium with Helium Ions
2.3 History
2.3.1 Who Discovered
Emilio Segrè and Carlo Perriero
Glenn T. Seaborg, Ralph A. James, Albert Ghiorso
2.3.2 Discovery
In 1937
In 1944
2.4 Abundance
2.4.1 Abundance In Universe
NANA
Thallium
5E-09 0.11
2.4.2 Abundance In Sun
~-9999 %~-9999 %
Beryllium
1E-08 0.1
2.4.4 Abundance In Meteorites
NANA
Gold
1.7E-07 22
2.4.5 Abundance In Earth's Crust
NANA
Radium
9.9E-12 8.1
2.4.7 Abundance In Oceans
NANA
Protactinium
2E-23 1.1
2.4.8 Abundance In Humans
NANA
Radium
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.
  • Curium metal is used to provide power to electrical equipment for space missions.
3.1.1 Industrial Uses
NA
NA
3.1.2 Medical Uses
NA
NA
3.1.3 Other Uses
Alloys, Nuclear Research, Research Purposes
Research Purposes
3.2 Biological Properties
3.2.1 Toxicity
Low Toxic
Unknown
3.2.2 Present in Human Body
3.2.3 In Blood
0.00 Blood/mg dm-30.00 Blood/mg dm-3
Plutonium
0 1970
3.2.5 In Bone
0.00 p.p.m.0.00 p.p.m.
Plutonium
0 170000
4 Physical
4.1 Melting Point
2,200.00 °C1,340.00 °C
Francium
27 3410
4.2 Boiling Point
4,877.00 °C3,110.00 °C
Flerovium
147 5660
4.3 Appearance
4.3.1 Physical State
Solid
Solid
4.3.2 Color
Shiny Gray
Silver
4.3.3 Luster
NA
Metallic
4.4 Hardness
4.4.1 Mohs Hardness
NANA
Cesium
0.2 8.5
4.4.3 Brinell Hardness
NANA
Cesium
0.14 3490
4.4.4 Vickers Hardness
NANA
Palladium
121 3430
4.5 Speed of Sound
16,200.00 m/sNA
Thallium
818 16200
4.6 Optical Properties
4.6.1 Refractive Index
NANA
Mercury
1.000933 1.7229
4.6.3 Reflectivity
NANA
Molybdenum
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
Cm
5.2 Isotopes
5.2.1 Known Isotopes
1815
Tennessine
0 38
5.3 Electronegativity
5.3.1 Pauling Electronegativity
1.901.30
Francium
0.7 2.54
5.3.5 Sanderson Electronegativity
NANA
Cesium
0.22 2.56
5.3.8 Allred Rochow Electronegativity
1.361.20
Cesium
0.86 1.82
5.3.10 Mulliken-Jaffe Electronegativity
NANA
Cesium
0.62 2.48
5.3.13 Allen Electronegativity
1.51NA
Cesium
0.659 2.7
5.4 Electropositivity
5.4.1 Pauling Electropositivity
2.102.70
Gold
1.46 3.3
5.6 Ionization Energies
5.6.1 1st Energy Level
702.00 kJ/mol581.00 kJ/mol
Cesium
375.7 26130
5.6.2 2nd Energy Level
1,470.00 kJ/mol1,196.00 kJ/mol
Ruthenium
710.2162 28750
5.7.1 3rd Energy Level
2,850.00 kJ/mol2,026.00 kJ/mol
Osmium
1600 34230
5.8.1 4th Energy Level
NA3,550.00 kJ/mol
Thorium
2780 37066
5.8.2 5th Energy Level
NANA
Dubnium
4305.2 97510
5.8.3 6th Energy Level
NANA
Seaborgium
5715.8 105800
5.8.4 7th Energy level
NANA
Bohrium
7226.8 114300
5.8.5 8th Energy Level
NANA
Hassium
8857.4 125300
5.8.6 9th Energy Level
NANA
Yttrium
14110 134700
5.8.7 10th Energy Level
NANA
Strontium
17100 144300
5.8.8 11th Energy Level
NANA
Yttrium
19900 169988
5.8.9 12th Energy Level
NANA
Molybdenum
22219 189368
5.8.10 13th Energy Level
NANA
Molybdenum
26930 76015
5.8.11 14th Energy Level
NANA
Molybdenum
29196 86450
5.8.12 15th Energy Level
NANA
Manganese
41987 97510
5.8.13 16th Energy Level
NANA
Iron
47206 109480
5.8.14 17th Energy Level
NANA
Cobalt
52737 122200
5.8.15 18th Energy Level
NANA
Nickel
58570 134810
5.8.16 19th Energy Level
NANA
Copper
64702 148700
5.8.17 20th Energy Level
NANA
Molybdenum
80400 171200
5.8.18 21st Energy Level
NANA
Molybdenum
87000 179100
5.8.19 22nd Energy Level
NANA
Molybdenum
93400 184900
5.8.20 23rd Energy Level
NANA
Molybdenum
98420 198800
5.8.21 24th Energy Level
NANA
Molybdenum
104400 195200
5.8.22 25th Energy Level
NANA
Molybdenum
121900 121900
5.8.23 26th Energy Level
NANA
Molybdenum
127700 127700
5.8.24 27th Energy Level
NANA
Molybdenum
133800 133800
5.8.25 28th Energy Level
NANA
Molybdenum
139800 139800
5.8.26 29th Energy Level
NANA
Molybdenum
148100 148100
5.8.27 30th Energy Level
NANA
Molybdenum
154500 154500
5.9 Electrochemical Equivalent
0.52 g/amp-hr3.07 g/amp-hr
Beryllium
0.16812 8.3209
5.10 Electron Work Function
NANA
Cesium
2.14 5.65
5.11 Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility
Ionization, Radioactive Isotopes
6 Atomic
6.1 Atomic Number
4396
Lithium
3 117
6.2 Electron Configuration
[Kr] 4d5 5s2
[Rn] 5f7 6d1 7s2
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
4396
Lithium
3 117
6.4.2 Number of Neutrons
55151
Lithium
4 184
6.4.3 Number of Electrons
4396
Lithium
3 117
6.5 Radius of an Atom
6.5.1 Atomic Radius
136.00 pm174.00 pm
Beryllium
112 265
6.5.2 Covalent Radius
147.00 pm169.00 pm
Beryllium
96 260
6.5.3 Van der Waals Radius
200.00 pm200.00 pm
Zinc
139 348
6.6 Atomic Weight
98.00 amu247.00 amu
Lithium
6.94 294
6.7 Atomic Volume
8.50 cm3/mol18.28 cm3/mol
Manganese
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)44.50 (-eV)
Francium
8 392.42
6.10 Lattice Constant
273.50 pmNA
Beryllium
228.58 891.25
6.11 Lattice Angles
π/2, π/2, 2 π/3
NA
6.12 Lattice C/A Ratio
1.60NA
Beryllium
1.567 1.886
7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
11.00 g/cm313.51 g/cm3
Lithium
0.534 40.7
7.1.2 Density When Liquid (at m.p.)
NA13.85 g/cm3
Lithium
0.512 20
7.2 Tensile Strength
NANA
Indium
2.5 11000
7.3 Viscosity
NANA
Mercury
0.001526 0.001526
7.4 Vapor Pressure
7.4.1 Vapor Pressure at 1000 K
NANA
Cerium
2.47E-11 121
7.4.2 Vapor Pressure at 2000 K
NANA
Tungsten
2.62E-10 774
7.5 Elasticity properties
7.5.1 Shear Modulus
NANA
Potassium
1.3 222
7.5.2 Bulk Modulus
NANA
Cesium
1.6 462
7.5.3 Young's Modulus
NANA
Cesium
1.7 528
7.6 Poisson Ratio
NANA
Beryllium
0.032 0.47
7.7 Other Mechanical Properties
NA
Unknown
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
11.5013.51
Lithium
0.53 4500
8.1.2 Magnetic Ordering
Paramagnetic
Antiferromagnetic
8.1.3 Permeability
NANA
Bismuth
1.25643E-06 0.0063
8.1.4 Susceptibility
NANA
Bismuth
-0.000166 200000
8.2 Electrical Properties
8.2.1 Electrical Property
Conductor
Unknown
8.2.2 Resistivity
200.00 nΩ·m1.25 nΩ·m
Thallium
0.18 961
8.2.3 Electrical Conductivity
0.07 106/cm ΩNA
Plutonium
0.00666 0.63
8.2.4 Electron Affinity
53.00 kJ/molNA
Mercury
0 222.8
9 Thermal
9.1 Specific Heat
0.21 J/(kg K)NA
Americium
0.11 3.6
9.2 Molar Heat Capacity
24.27 J/mol·KNA
Beryllium
16.443 62.7
9.3 Thermal Conductivity
50.60 W/m·KNA
Neptunium
6.3 429
9.4 Critical Temperature
NANA
Ytterbium
26.3 3223
9.5 Thermal Expansion
7.10 µm/(m·K)NA
Tungsten
4.5 97
9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
660.00 kJ/molNA
Zinc
7.32 799.1
9.6.2 Enthalpy of Fusion
23.01 kJ/mol15.00 kJ/mol
Cesium
2.1 35.23
9.6.3 Enthalpy of Atomization
649.00 kJ/molNA
Mercury
61.5 837
9.7 Standard Molar Entropy
181.10 J/mol.KNA
Beryllium
9.5 198.1