1 Periodic Table
1.1 Symbol
Db
1.2 Group Number
1.3 Period Number
1.4 Block
d block
1.5 Element Family
Transition Metal
1.6 CAS Number
53850354
Rank: 14 (Overall) ▶
7429905
54386242
1.7 Space Group Name
Not Available
1.8 Space Group Number
Not Available
Rank: N/A (Overall) ▶
11
229
2 Facts
2.1 Interesting Facts
- IUPAC allotted a temporary name to Dubnium metal as “ Unnilpentium”.
- In the production of Dubnium, thermal gradient chromatography is used.
2.2 Sources
Produced by Bombarding Am243 with Ne22, Synthetically Produced
2.3 History
2.3.1 Who Discovered
Joint Institute for Nuclear Research
2.3.2 Discovery
In 1968
2.4 Abundance
2.4.1 Abundance In Universe
Not Available
Rank: N/A (Overall) ▶
5E-09
0.11
2.4.2 Abundance In Sun
~-9999 %
Rank: N/A (Overall) ▶
1E-08
0.1
2.4.3 Abundance In Meteorites
Not Available
Rank: N/A (Overall) ▶
1.7E-07
22
2.4.4 Abundance In Earth's Crust
Not Available
Rank: N/A (Overall) ▶
9.9E-12
8.1
2.4.5 Abundance In Oceans
Not Available
Rank: N/A (Overall) ▶
2E-23
1.1
2.4.6 Abundance In Humans
Not Available
Rank: N/A (Overall) ▶
1E-13
1.4
3 Uses
3.1 Uses & Benefits
- Currently known uses of Dubnium metal are limited to research purpose only.
3.1.1 Industrial Uses
NA
3.1.2 Medical Uses
NA
3.1.3 Other Uses
Research Purposes
3.2 Biological Properties
3.2.1 Toxicity
Unknown
3.2.2 Present in Human Body
✔
✘
60% - Transition Metals Metals have it !
▶
3.2.3 In Blood
0.00 Blood/mg dm-3
Rank: 37 (Overall) ▶
0
1970
3.2.4 In Bone
0.00 p.p.m.
Rank: 36 (Overall) ▶
0
170000
4 Physical
4.1 Melting Point
Not Available
Rank: N/A (Overall) ▶
27
3410
4.2 Boiling Point
Not Available
Rank: N/A (Overall) ▶
147
5660
4.3 Appearance
4.3.1 Physical State
Solid
4.3.2 Color
Unknown
4.3.3 Luster
Unknown Luster
4.4 Hardness
4.4.1 Mohs Hardness
Not Available
Rank: N/A (Overall) ▶
0.2
8.5
4.4.2 Brinell Hardness
Not Available
Rank: N/A (Overall) ▶
0.14
3490
4.4.3 Vickers Hardness
Not Available
Rank: N/A (Overall) ▶
121
3430
4.5 Speed of Sound
Not Available
Rank: N/A (Overall) ▶
818
16200
4.6 Optical Properties
4.6.1 Refractive Index
Not Available
Rank: N/A (Overall) ▶
1.000933
1.7229
4.6.2 Reflectivity
Not Available
Rank: N/A (Overall) ▶
58
97
4.7 Allotropes
✔
✘
6% - Transition Metals Metals have it !
▶
4.7.1 α Allotropes
Not Available
4.7.2 β Allotropes
Not Available
4.7.3 γ Allotropes
Not Available
5 Chemical
5.1 Chemical Formula
Db
5.2 Isotopes
5.2.1 Known Isotopes
5.3 Electronegativity
5.3.1 Pauling Electronegativity
Not Available
Rank: N/A (Overall) ▶
0.7
2.54
5.3.2 Sanderson Electronegativity
Not Available
Rank: N/A (Overall) ▶
0.22
2.56
5.3.3 Allred Rochow Electronegativity
Not Available
Rank: N/A (Overall) ▶
0.86
1.82
5.3.4 Mulliken-Jaffe Electronegativity
Not Available
Rank: N/A (Overall) ▶
0.62
2.48
5.3.5 Allen Electronegativity
Not Available
Rank: N/A (Overall) ▶
0.659
2.7
5.4 Electropositivity
5.4.1 Pauling Electropositivity
Not Available
Rank: N/A (Overall) ▶
1.46
3.3
5.5 Ionization Energies
5.5.1 1st Energy Level
664.80 kJ/mol
Rank: 38 (Overall) ▶
375.7
26130
5.5.2 2nd Energy Level
1,546.70 kJ/mol
Rank: 38 (Overall) ▶
710.2162
28750
5.5.3 3rd Energy Level
2,378.40 kJ/mol
Rank: 53 (Overall) ▶
1600
34230
5.5.4 4th Energy Level
3,298.80 kJ/mol
Rank: 61 (Overall) ▶
2780
37066
5.5.5 5th Energy Level
4,305.20 kJ/mol
Rank: 39 (Overall) ▶
4305.2
97510
5.5.6 6th Energy Level
Not Available
Rank: N/A (Overall) ▶
5715.8
105800
5.5.7 7th Energy level
Not Available
Rank: N/A (Overall) ▶
7226.8
114300
5.5.8 8th Energy Level
Not Available
Rank: N/A (Overall) ▶
8857.4
125300
5.5.9 9th Energy Level
Not Available
Rank: N/A (Overall) ▶
14110
134700
5.5.10 10th Energy Level
Not Available
Rank: N/A (Overall) ▶
17100
144300
5.5.11 11th Energy Level
Not Available
Rank: N/A (Overall) ▶
19900
169988
5.5.12 12th Energy Level
Not Available
Rank: N/A (Overall) ▶
22219
189368
5.5.13 13th Energy Level
Not Available
Rank: N/A (Overall) ▶
26930
76015
5.5.14 14th Energy Level
Not Available
Rank: N/A (Overall) ▶
29196
86450
5.5.15 15th Energy Level
Not Available
Rank: N/A (Overall) ▶
41987
97510
5.5.16 16th Energy Level
Not Available
Rank: N/A (Overall) ▶
47206
109480
5.5.17 17th Energy Level
Not Available
Rank: N/A (Overall) ▶
52737
122200
5.5.18 18th Energy Level
Not Available
Rank: N/A (Overall) ▶
58570
134810
5.5.19 19th Energy Level
Not Available
Rank: N/A (Overall) ▶
64702
148700
5.5.20 20th Energy Level
Not Available
Rank: N/A (Overall) ▶
80400
171200
5.5.21 21st Energy Level
Not Available
Rank: N/A (Overall) ▶
87000
179100
5.5.22 22nd Energy Level
Not Available
Rank: N/A (Overall) ▶
93400
184900
5.5.23 23rd Energy Level
Not Available
Rank: N/A (Overall) ▶
98420
198800
5.5.24 24th Energy Level
Not Available
Rank: N/A (Overall) ▶
104400
195200
5.5.25 25th Energy Level
Not Available
Rank: N/A (Overall) ▶
121900
121900
5.5.26 26th Energy Level
Not Available
Rank: N/A (Overall) ▶
127700
127700
5.5.27 27th Energy Level
Not Available
Rank: N/A (Overall) ▶
133800
133800
5.5.28 28th Energy Level
Not Available
Rank: N/A (Overall) ▶
139800
139800
5.5.29 29th Energy Level
Not Available
Rank: N/A (Overall) ▶
148100
148100
5.5.30 30th Energy Level
Not Available
Rank: N/A (Overall) ▶
154500
154500
5.6 Electrochemical Equivalent
Not Available
Rank: N/A (Overall) ▶
0.16812
8.3209
5.7 Electron Work Function
Not Available
Rank: N/A (Overall) ▶
2.14
5.65
5.8 Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
6 Atomic
6.1 Atomic Number
6.2 Electron Configuration
[Rn] 5f14 6d3 7s2
6.3 Crystal Structure
Body Centered Cubic (BCC)
6.3.1 Crystal Lattice
6.4 Atom
6.4.1 Number of Protons
6.4.2 Number of Neutrons
6.4.3 Number of Electrons
6.5 Radius of an Atom
6.5.1 Atomic Radius
139.00 pm
Rank: 39 (Overall) ▶
112
265
6.5.2 Covalent Radius
149.00 pm
Rank: 35 (Overall) ▶
96
260
6.5.3 Van der Waals Radius
Not Available
Rank: N/A (Overall) ▶
139
348
6.6 Atomic Weight
268.00 amu
Rank: 10 (Overall) ▶
6.94
294
6.7 Atomic Volume
Not Available
Rank: N/A (Overall) ▶
1.39
71.07
6.8 Adjacent Atomic Numbers
6.8.1 Previous Element
6.8.2 Next Element
6.9 Valence Electron Potential
Not Available
Rank: N/A (Overall) ▶
8
392.42
6.10 Lattice Constant
Not Available
Rank: N/A (Overall) ▶
228.58
891.25
6.11 Lattice Angles
NA
6.12 Lattice C/A Ratio
Not Available
Rank: N/A (Overall) ▶
1.567
1.886
7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
29.30 g/cm3
Rank: 5 (Overall) ▶
0.534
40.7
7.1.2 Density When Liquid (at m.p.)
Not Available
Rank: N/A (Overall) ▶
0.512
20
7.2 Tensile Strength
Not Available
Rank: N/A (Overall) ▶
2.5
11000
7.3 Viscosity
Not Available
Rank: N/A (Overall) ▶
0.001526
0.001526
7.4 Vapor Pressure
7.4.1 Vapor Pressure at 1000 K
Not Available
Rank: N/A (Overall) ▶
2.47E-11
121
7.4.2 Vapor Pressure at 2000 K
Not Available
Rank: N/A (Overall) ▶
2.62E-10
774
7.5 Elasticity properties
7.5.1 Shear Modulus
Not Available
Rank: N/A (Overall) ▶
1.3
222
7.5.2 Bulk Modulus
Not Available
Rank: N/A (Overall) ▶
1.6
462
7.5.3 Young's Modulus
Not Available
Rank: N/A (Overall) ▶
1.7
528
7.6 Poisson Ratio
Not Available
Rank: N/A (Overall) ▶
0.032
0.47
7.7 Other Mechanical Properties
Unknown
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
Not Available
Rank: N/A (Overall) ▶
0.53
4500
8.1.2 Magnetic Ordering
Unknown
8.1.3 Permeability
Not Available
Rank: N/A (Overall) ▶
1.25643E-06
0.0063
8.1.4 Susceptibility
Not Available
Rank: N/A (Overall) ▶
-0.000166
200000
8.2 Electrical Properties
8.2.1 Electrical Property
Unknown
8.2.2 Resistivity
Not Available
Rank: N/A (Overall) ▶
0.18
961
8.2.3 Electrical Conductivity
Not Available
Rank: N/A (Overall) ▶
0.00666
0.63
8.2.4 Electron Affinity
Not Available
Rank: N/A (Overall) ▶
0
222.8
9 Thermal
9.1 Specific Heat
Not Available
Rank: N/A (Overall) ▶
0.11
3.6
9.2 Molar Heat Capacity
Not Available
Rank: N/A (Overall) ▶
16.443
62.7
9.3 Thermal Conductivity
Not Available
Rank: N/A (Overall) ▶
6.3
429
9.4 Critical Temperature
Not Available
Rank: N/A (Overall) ▶
26.3
3223
9.5 Thermal Expansion
Not Available
Rank: N/A (Overall) ▶
4.5
97
9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
Not Available
Rank: N/A (Overall) ▶
7.32
799.1
9.6.2 Enthalpy of Fusion
Not Available
Rank: N/A (Overall) ▶
2.1
35.23
9.6.3 Enthalpy of Atomization
Not Available
Rank: N/A (Overall) ▶
61.5
837
9.7 Standard Molar Entropy
Not Available
Rank: N/A (Overall) ▶
9.5
198.1