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Dubnium vs Darmstadtium

Dubnium
Darmstadtium
Darmstadtium vs Dubnium


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