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Terbium
Terbium

Dubnium
Dubnium



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Terbium
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Terbium vs Dubnium

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1 Periodic Table
1.1 Symbol
Tb
Db
1.2 Group Number
NA5
Gadolinium
0 17
1.4 Period Number
67
Lithium
2 7
1.5 Block
f block
d block
1.6 Element Family
Lanthanide
Transition Metal
1.7 CAS Number
744027953850354
Aluminium
7429905 54386242
1.4 Space Group Name
P63/mmc
Not Available
3.5 Space Group Number
194.00NA
Plutonium
11 229
5 Facts
5.1 Interesting Facts
  • At times Terbium metal acts same as Calcium.
  • Terbium metal closely similar to Lanthanum metal.
  • IUPAC allotted a temporary name to Dubnium metal as “ Unnilpentium”.
  • In the production of Dubnium, thermal gradient chromatography is used.
5.2 Sources
Found in Minerals, Found with Other Rare Earth Metals, Mining, Ores of Minerals
Produced by Bombarding Am243 with Ne22, Synthetically Produced
5.3 History
5.3.1 Who Discovered
Carl Gustaf Mosander
Joint Institute for Nuclear Research
5.3.2 Discovery
In 1842
In 1968
5.4 Abundance
5.4.1 Abundance In Universe
5 * 10-8 %NA
Thallium
5E-09 0.11
6.1.1 Abundance In Sun
~0.00000001 %~-9999 %
Beryllium
1E-08 0.1
6.2.2 Abundance In Meteorites
0.00 %NA
Gold
1.7E-07 22
6.4.2 Abundance In Earth's Crust
0.00 %NA
Radium
9.9E-12 8.1
1.1.1 Abundance In Oceans
0.00 %NA
Protactinium
2E-23 1.1
2.3.3 Abundance In Humans
NANA
Radium
1E-13 1.4
4 Uses
4.1 Uses & Benefits
  • Terbium salts are used in optical devices like laser devices.
  • Terbium’s alloy lengthens and shortens the magnetic field and this effect forms loudspeaker.
  • Currently known uses of Dubnium metal are limited to research purpose only.
4.1.1 Industrial Uses
Electronic Industry
NA
4.1.2 Medical Uses
NA
NA
4.1.3 Other Uses
Alloys
Research Purposes
4.2 Biological Properties
4.2.1 Toxicity
Low Toxic
Unknown
4.2.2 Present in Human Body
4.2.3 In Blood
NA0.00 Blood/mg dm-3
Plutonium
0 1970
4.8.3 In Bone
NA0.00 p.p.m.
Plutonium
0 170000
5 Physical
5.1 Melting Point
1,356.00 °CNA
Francium
27 3410
7.3 Boiling Point
3,123.00 °CNA
Flerovium
147 5660
8.8 Appearance
8.8.1 Physical State
Solid
Solid
8.8.2 Color
Silvery White
Unknown
8.8.3 Luster
Metallic
Unknown Luster
8.9 Hardness
8.9.1 Mohs Hardness
NANA
Cesium
0.2 8.5
1.2.2 Brinell Hardness
677.00 MPaNA
Cesium
0.14 3490
1.8.2 Vickers Hardness
863.00 MPaNA
Palladium
121 3430
2.2 Speed of Sound
2,620.00 m/sNA
Thallium
818 16200
2.5 Optical Properties
2.5.1 Refractive Index
NANA
Mercury
1.000933 1.7229
2.7.2 Reflectivity
NANA
Molybdenum
58 97
3.7 Allotropes
3.7.1 α Allotropes
Not Available
Not Available
3.7.2 β Allotropes
Not Available
Not Available
3.7.3 γ Allotropes
Not Available
Not Available
4 Chemical
4.1 Chemical Formula
Tb
Db
4.2 Isotopes
4.2.1 Known Isotopes
2610
Tennessine
0 38
4.4 Electronegativity
4.4.1 Pauling Electronegativity
NANA
Francium
0.7 2.54
4.6.4 Sanderson Electronegativity
NANA
Cesium
0.22 2.56
5.1.1 Allred Rochow Electronegativity
1.10NA
Cesium
0.86 1.82
5.1.4 Mulliken-Jaffe Electronegativity
NANA
Cesium
0.62 2.48
6.1.1 Allen Electronegativity
NANA
Cesium
0.659 2.7
6.2 Electropositivity
6.2.1 Pauling Electropositivity
NANA
Gold
1.46 3.3
6.5 Ionization Energies
6.5.1 1st Energy Level
603.40 kJ/mol664.80 kJ/mol
Cesium
375.7 26130
6.5.2 2nd Energy Level
1,174.80 kJ/mol1,546.70 kJ/mol
Ruthenium
710.2162 28750
6.6.1 3rd Energy Level
2,417.00 kJ/mol2,378.40 kJ/mol
Osmium
1600 34230
6.7.1 4th Energy Level
4,203.00 kJ/mol3,298.80 kJ/mol
Thorium
2780 37066
6.7.4 5th Energy Level
NA4,305.20 kJ/mol
Tin
4305.2 97510
6.9.2 6th Energy Level
NANA
Seaborgium
5715.8 105800
6.9.3 7th Energy level
NANA
Bohrium
7226.8 114300
6.9.6 8th Energy Level
NANA
Hassium
8857.4 125300
6.11.2 9th Energy Level
NANA
Yttrium
14110 134700
6.11.6 10th Energy Level
NANA
Strontium
17100 144300
6.12.2 11th Energy Level
NANA
Yttrium
19900 169988
6.12.6 12th Energy Level
NANA
Molybdenum
22219 189368
6.13.1 13th Energy Level
NANA
Molybdenum
26930 76015
6.14.1 14th Energy Level
NANA
Molybdenum
29196 86450
6.14.3 15th Energy Level
NANA
Manganese
41987 97510
3.4.2 16th Energy Level
NANA
Iron
47206 109480
4.4.2 17th Energy Level
NANA
Cobalt
52737 122200
4.6.2 18th Energy Level
NANA
Nickel
58570 134810
4.7.3 19th Energy Level
NANA
Copper
64702 148700
5.5.2 20th Energy Level
NANA
Molybdenum
80400 171200
5.5.5 21st Energy Level
NANA
Molybdenum
87000 179100
5.6.2 22nd Energy Level
NANA
Molybdenum
93400 184900
6.3.4 23rd Energy Level
NANA
Molybdenum
98420 198800
6.3.8 24th Energy Level
NANA
Molybdenum
104400 195200
6.3.10 25th Energy Level
NANA
Molybdenum
121900 121900
8.1.1 26th Energy Level
NANA
Molybdenum
127700 127700
8.2.2 27th Energy Level
NANA
Molybdenum
133800 133800
8.3.2 28th Energy Level
NANA
Molybdenum
139800 139800
9.3.1 29th Energy Level
NANA
Molybdenum
148100 148100
9.6.1 30th Energy Level
NANA
Molybdenum
154500 154500
10.4 Electrochemical Equivalent
1.98 g/amp-hrNA
Beryllium
0.16812 8.3209
10.8 Electron Work Function
3.00 eVNA
Cesium
2.14 5.65
11.2 Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility
Ionization, Radioactive Isotopes, Radioactivity
12 Atomic
12.1 Atomic Number
65105
Lithium
3 117
13.4 Electron Configuration
[Xe] 4f9 6s2
[Rn] 5f14 6d3 7s2
13.5 Crystal Structure
Hexagonal Close Packed (HCP)
Body Centered Cubic (BCC)
13.5.1 Crystal Lattice
13.6 Atom
13.6.1 Number of Protons
65105
Lithium
3 117
14.5.3 Number of Neutrons
94157
Lithium
4 184
15.3.3 Number of Electrons
65105
Lithium
3 117
15.7 Radius of an Atom
15.7.1 Atomic Radius
177.00 pm139.00 pm
Beryllium
112 265
15.7.5 Covalent Radius
194.00 pm149.00 pm
Beryllium
96 260
15.9.3 Van der Waals Radius
221.00 pmNA
Zinc
139 348
16.4 Atomic Weight
158.93 amu268.00 amu
Lithium
6.94 294
16.5 Atomic Volume
19.20 cm3/molNA
Manganese
1.39 71.07
16.7 Adjacent Atomic Numbers
16.7.1 Previous Element
16.7.2 Next Element
16.8 Valence Electron Potential
46.80 (-eV)NA
Francium
8 392.42
16.9 Lattice Constant
360.10 pmNA
Beryllium
228.58 891.25
16.10 Lattice Angles
π/2, π/2, 2 π/3
NA
16.11 Lattice C/A Ratio
1.58NA
Beryllium
1.567 1.886
17 Mechanical
17.1 Density
17.1.1 Density At Room Temperature
8.23 g/cm329.30 g/cm3
Lithium
0.534 40.7
17.1.8 Density When Liquid (at m.p.)
7.65 g/cm3NA
Lithium
0.512 20
17.5 Tensile Strength
60.00 MPaNA
Indium
2.5 11000
17.7 Viscosity
NANA
Mercury
0.001526 0.001526
17.9 Vapor Pressure
17.9.1 Vapor Pressure at 1000 K
0.00 (Pa)NA
Cerium
2.47E-11 121
18.1.3 Vapor Pressure at 2000 K
12.50 (Pa)NA
Tungsten
2.62E-10 774
18.2 Elasticity properties
18.2.1 Shear Modulus
22.10 GPaNA
Potassium
1.3 222
18.3.5 Bulk Modulus
38.70 GPaNA
Cesium
1.6 462
18.4.3 Young's Modulus
55.70 GPaNA
Cesium
1.7 528
18.6 Poisson Ratio
0.26NA
Beryllium
0.032 0.47
18.8 Other Mechanical Properties
Ductile, Malleable
Unknown
19 Magnetic
19.1 Magnetic Characteristics
19.1.1 Specific Gravity
8.23NA
Lithium
0.53 4500
19.1.5 Magnetic Ordering
Paramagnetic
Unknown
19.1.6 Permeability
NANA
Bismuth
1.25643E-06 0.0063
19.1.9 Susceptibility
NANA
Bismuth
-0.000166 200000
19.2 Electrical Properties
19.2.1 Electrical Property
Conductor
Unknown
19.2.2 Resistivity
1.15 nΩ·mNA
Thallium
0.18 961
19.2.6 Electrical Conductivity
0.01 106/cm ΩNA
Plutonium
0.00666 0.63
19.2.10 Electron Affinity
50.00 kJ/molNA
Mercury
0 222.8
20 Thermal
20.1 Specific Heat
0.18 J/(kg K)NA
Americium
0.11 3.6
20.2 Molar Heat Capacity
28.91 J/mol·KNA
Beryllium
16.443 62.7
21.2 Thermal Conductivity
11.10 W/m·KNA
Neptunium
6.3 429
21.4 Critical Temperature
NANA
Ytterbium
26.3 3223
21.7 Thermal Expansion
10.30 µm/(m·K)NA
Tungsten
4.5 97
22.2 Enthalpy
22.2.1 Enthalpy of Vaporization
330.90 kJ/molNA
Zinc
7.32 799.1
22.6.3 Enthalpy of Fusion
10.80 kJ/molNA
Cesium
2.1 35.23
22.6.8 Enthalpy of Atomization
314.00 kJ/molNA
Mercury
61.5 837
22.9 Standard Molar Entropy
73.20 J/mol.KNA
Beryllium
9.5 198.1