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Darmstadtium vs Dubnium

Darmstadtium
Dubnium
Dubnium vs Darmstadtium


Periodic Table
Symbol
Ds  
Db  
Group Number
10  
8
5  
13
Period Number
7  
7  
Block
d block  
d block  
Element Family
Probably Transition  
Transition Metal  
CAS Number
54083771  
8
53850354  
14
Space Group Name
-  
-  
Space Group Number
166.00  
9
166.00  
9
Facts
Interesting Facts
Darmstadtium is a synthetic element that is highly radioactive.  
  • IUPAC allotted a temporary name to Dubnium metal as “ Unnilpentium”.
  • In the production of Dubnium, thermal gradient chromatography is used.
  
Sources
Synthetically Produced  
Produced by Bombarding Am243 with Ne22, Synthetically Produced  
History
  
  
Who Discovered
Gesellschaft für Schwerionenforschung  
Joint Institute for Nuclear Research  
Discovery
In 1994  
In 1968  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
40
Abundance In Sun
-  
-  
Abundance In Meteorites
0.00 %  
99+
0.00 %  
99+
Abundance In Earth's Crust
-  
-  
Abundance In Oceans
-  
-  
Abundance In Humans
-  
-  
Uses
Uses & Benefits
  • Currently known uses of Darmstadtium metal are limited to research purpose only. As only few atoms of this metal are produced.
  
  • Currently known uses of Dubnium metal are limited to research purpose only.
  
Industrial Uses
-  
-  
Medical Uses
-  
-  
Other Uses
Research Purposes  
Research Purposes  
Biological Properties
  
  
Toxicity
-  
-  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
40
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
-  
-  
Boiling Point
0.00 °C  
99+
0.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
-  
-  
Luster
Unknown Luster  
Unknown Luster  
Hardness
  
  
Mohs Hardness
6.00  
6
6.00  
6
Brinell Hardness
350.00 MPa  
36
330.00 MPa  
38
Vickers Hardness
500.00 MPa  
35
400.00 MPa  
99+
Speed of Sound
5,090.00 m/s  
13
2,680.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.30  
99+
1.20  
99+
Reflectivity
50.00 %  
31
55.00 %  
27
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ds  
Db  
Isotopes
  
  
Known Isotopes
9  
29
10  
28
Electronegativity
  
  
Pauling Electronegativity
1.10  
99+
2.20  
5
Sanderson Electronegativity
1.30  
25
1.30  
25
Allred Rochow Electronegativity
1.10  
31
1.30  
25
Mulliken-Jaffe Electronegativity
1.10  
99+
1.10  
99+
Allen Electronegativity
1.10  
99+
1.30  
40
Electropositivity
  
  
Pauling Electropositivity
2.20  
39
2.00  
99+
Ionization Energies
  
  
1st Energy Level
955.20 kJ/mol  
5
664.80 kJ/mol  
38
2nd Energy Level
1,891.10 kJ/mol  
16
1,546.70 kJ/mol  
39
3rd Energy Level
3,029.60 kJ/mol  
25
2,378.40 kJ/mol  
99+
4th Energy Level
3,955.90 kJ/mol  
99+
3,298.80 kJ/mol  
99+
5th Energy Level
5,113.70 kJ/mol  
99+
4,305.20 kJ/mol  
99+
6th Energy Level
10,700.00 kJ/mol  
12
12,900.00 kJ/mol  
5
7th Energy level
3,540.00 kJ/mol  
99+
3,300.00 kJ/mol  
99+
8th Energy Level
6,630.00 kJ/mol  
40
5,280.00 kJ/mol  
99+
9th Energy Level
7,180.00 kJ/mol  
29
5,780.00 kJ/mol  
99+
10th Energy Level
10,700.00 kJ/mol  
20
8,830.00 kJ/mol  
22
11th Energy Level
3,540.00 kJ/mol  
99+
3,300.00 kJ/mol  
99+
12th Energy Level
34,800.00 kJ/mol  
28
88,300.00 kJ/mol  
2
13th Energy Level
5,280.00 kJ/mol  
99+
4,760.00 kJ/mol  
99+
14th Energy Level
1,130.00 kJ/mol  
99+
1,120.00 kJ/mol  
99+
15th Energy Level
34,400.00 kJ/mol  
99+
33,000.00 kJ/mol  
99+
16th Energy Level
34,800.00 kJ/mol  
99+
33,000.00 kJ/mol  
99+
17th Energy Level
1,139.00 kJ/mol  
18
1,129.00 kJ/mol  
19
18th Energy Level
1,080.00 kJ/mol  
99+
0.00 kJ/mol  
99+
19th Energy Level
1,139.90 kJ/mol  
15
1,094.90 kJ/mol  
18
20th Energy Level
0.00 kJ/mol  
99+
0.00 kJ/mol  
99+
21st Energy Level
1,080.00 kJ/mol  
32
883.00 kJ/mol  
36
22nd Energy Level
350.00 kJ/mol  
99+
330.00 kJ/mol  
99+
23rd Energy Level
1,100.00 kJ/mol  
35
1,150.00 kJ/mol  
33
24th Energy Level
565.80 kJ/mol  
99+
528.30 kJ/mol  
99+
25th Energy Level
0.00 kJ/mol  
99+
0.00 kJ/mol  
99+
26th Energy Level
582.30 kJ/mol  
99+
579.80 kJ/mol  
99+
27th Energy Level
0.00 kJ/mol  
99+
0.00 kJ/mol  
99+
28th Energy Level
1,130.00 kJ/mol  
4
1,150.00 kJ/mol  
3
29th Energy Level
1,130.00 kJ/mol  
4
1,094.00 kJ/mol  
5
30th Energy Level
663.20 kJ/mol  
33
0.00 kJ/mol  
99+
Electrochemical Equivalent
3.00 g/amp-hr  
21
3.00 g/amp-hr  
21
Electron Work Function
4.90 eV  
12
4.90 eV  
12
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Ionization, Radioactive Isotopes, Radioactivity  
Atomic
Atomic Number
110  
8
105  
13
Electron Configuration
[Rn] 5f14 6d8 7s2  
[Rn] 5f14 6d3 7s2  
Crystal Structure
Body Centered Cubic (BCC)  
Body Centered Cubic (BCC)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
110  
8
105  
13
Number of Neutrons
161  
4
157  
8
Number of Electrons
110  
8
105  
13
Radius of an Atom
  
  
Atomic Radius
132.00 pm  
99+
139.00 pm  
99+
Covalent Radius
128.00 pm  
99+
149.00 pm  
37
Van der Waals Radius
0.00 pm  
99+
0.00 pm  
99+
Atomic Weight
281.00 amu  
6
268.00 amu  
10
Atomic Volume
20.50 cm3/mol  
29
22.80 cm3/mol  
17
Adjacent Atomic Numbers
  
  
Previous Element
Meitnerium
  
Rutherfordium
  
Next Element
Roentgenium
  
Seaborgium
  
Valence Electron Potential
0.00 (-eV)  
99+
0.00 (-eV)  
99+
Lattice Constant
0.00 pm  
99+
-  
Lattice Angles
-  
-  
Lattice C/A Ratio
1.61  
19
1.63  
14
Mechanical
Density
  
  
Density At Room Temperature
35.00 g/cm3  
4
29.30 g/cm3  
5
Density When Liquid (at m.p.)
34.80 g/cm3  
5
29.30 g/cm3  
6
Tensile Strength
0.10 MPa  
99+
0.10 MPa  
99+
Viscosity
0.00  
25
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
22
Vapor Pressure at 2000 K
0.00 (Pa)  
37
0.00 (Pa)  
30
Elasticity properties
  
  
Shear Modulus
33.00 GPa  
23
34.00 GPa  
22
Bulk Modulus
38.00 GPa  
99+
39.00 GPa  
39
Young's Modulus
0.00 GPa  
99+
0.00 GPa  
99+
Poisson Ratio
0.25  
24
0.39  
5
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
34.80  
7
39.00  
3
Magnetic Ordering
-  
-  
Permeability
0.00 H/m  
17
0.00 H/m  
17
Susceptibility
0.00  
24
0.00  
24
Electrical Properties
  
  
Electrical Property
-  
-  
Resistivity
8.30 nΩ·m  
99+
6.80 nΩ·m  
99+
Electrical Conductivity
0.00 106/cm Ω  
99+
0.00 106/cm Ω  
99+
Electron Affinity
-  
-  
Thermal
Specific Heat
0.10 J/(kg K)  
99+
0.10 J/(kg K)  
99+
Molar Heat Capacity
27.30 J/mol·K  
23
29.30 J/mol·K  
11
Thermal Conductivity
0.00 W/m·K  
99+
0.00 W/m·K  
99+
Critical Temperature
1,323.00 K  
99+
1,323.00 K  
99+
Thermal Expansion
12.90 µm/(m·K)  
38
13.20 µm/(m·K)  
37
Enthalpy
  
  
Enthalpy of Vaporization
348.90 kJ/mol  
34
289.70 kJ/mol  
99+
Enthalpy of Fusion
-  
-  
Enthalpy of Atomization
-  
-  
Standard Molar Entropy
57.00 J/mol.K  
30
55.00 J/mol.K  
34
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