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Roentgenium vs Darmstadtium

Roentgenium
Darmstadtium
Darmstadtium vs Roentgenium


Periodic Table
Symbol
Rg  
Ds  
Group Number
11  
7
10  
8
Period Number
7  
7  
Block
d block  
d block  
Element Family
-  
Probably Transition  
CAS Number
54386242  
1
54083771  
8
Space Group Name
-  
-  
Space Group Number
194.00  
7
166.00  
9
Facts
Interesting Facts
Roentgenium is a highly unstable synthetic element.  
Darmstadtium is a synthetic element that is highly radioactive.  
Sources
Synthetically Produced  
Synthetically Produced  
History
  
  
Who Discovered
Gesellschaft für Schwerionenforschung  
Gesellschaft für Schwerionenforschung  
Discovery
In 1994  
In 1994  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
40
Abundance In Sun
-  
-  
Abundance In Meteorites
-  
0.00 %  
99+
Abundance In Earth's Crust
-  
-  
Abundance In Oceans
-  
-  
Abundance In Humans
-  
-  
Uses
Uses & Benefits
  • Currently known uses of Roentgenium 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
2,800.00 °C  
38
0.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
-  
Luster
Unknown Luster  
Unknown Luster  
Hardness
  
  
Mohs Hardness
-  
6.00  
6
Brinell Hardness
700.00 MPa  
17
350.00 MPa  
36
Vickers Hardness
450.00 MPa  
38
500.00 MPa  
35
Speed of Sound
3,430.00 m/s  
32
5,090.00 m/s  
13
Optical Properties
  
  
Refractive Index
1.30  
99+
1.30  
99+
Reflectivity
64.00 %  
19
50.00 %  
31
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Rg  
Ds  
Isotopes
  
  
Known Isotopes
1  
34
9  
29
Electronegativity
  
  
Pauling Electronegativity
0.00  
99+
1.10  
99+
Sanderson Electronegativity
1.90  
13
1.30  
25
Allred Rochow Electronegativity
1.30  
25
1.10  
31
Mulliken-Jaffe Electronegativity
0.90  
99+
1.10  
99+
Allen Electronegativity
0.80  
99+
1.10  
99+
Electropositivity
  
  
Pauling Electropositivity
2.20  
39
2.20  
39
Ionization Energies
  
  
1st Energy Level
1,022.70 kJ/mol  
3
955.20 kJ/mol  
5
2nd Energy Level
2,074.40 kJ/mol  
10
1,891.10 kJ/mol  
16
3rd Energy Level
3,077.90 kJ/mol  
24
3,029.60 kJ/mol  
25
4th Energy Level
4,052.40 kJ/mol  
99+
3,955.90 kJ/mol  
99+
5th Energy Level
5,306.70 kJ/mol  
99+
5,113.70 kJ/mol  
99+
6th Energy Level
11,100.00 kJ/mol  
10
10,700.00 kJ/mol  
12
7th Energy level
5,800.00 kJ/mol  
99+
3,540.00 kJ/mol  
99+
8th Energy Level
5,800.00 kJ/mol  
99+
6,630.00 kJ/mol  
40
9th Energy Level
5,650.00 kJ/mol  
99+
7,180.00 kJ/mol  
29
10th Energy Level
5,800.00 kJ/mol  
99+
10,700.00 kJ/mol  
20
11th Energy Level
8,300.00 kJ/mol  
24
3,540.00 kJ/mol  
99+
12th Energy Level
8,300.00 kJ/mol  
99+
34,800.00 kJ/mol  
28
13th Energy Level
8,700.00 kJ/mol  
16
5,280.00 kJ/mol  
99+
14th Energy Level
8,300.00 kJ/mol  
16
1,130.00 kJ/mol  
99+
15th Energy Level
87,000.00 kJ/mol  
9
34,400.00 kJ/mol  
99+
16th Energy Level
83,000.00 kJ/mol  
11
34,800.00 kJ/mol  
99+
17th Energy Level
830.80 kJ/mol  
30
1,139.00 kJ/mol  
18
18th Energy Level
8,300.00 kJ/mol  
19
1,080.00 kJ/mol  
99+
19th Energy Level
580.00 kJ/mol  
99+
1,139.90 kJ/mol  
15
20th Energy Level
580.00 kJ/mol  
99+
0.00 kJ/mol  
99+
21st Energy Level
5,800.00 kJ/mol  
21
1,080.00 kJ/mol  
32
22nd Energy Level
580.00 kJ/mol  
99+
350.00 kJ/mol  
99+
23rd Energy Level
5,800.00 kJ/mol  
21
1,100.00 kJ/mol  
35
24th Energy Level
538.70 kJ/mol  
99+
565.80 kJ/mol  
99+
25th Energy Level
0.00 kJ/mol  
99+
0.00 kJ/mol  
99+
26th Energy Level
580.00 kJ/mol  
99+
582.30 kJ/mol  
99+
27th Energy Level
580.00 kJ/mol  
99+
0.00 kJ/mol  
99+
28th Energy Level
880.00 kJ/mol  
8
1,130.00 kJ/mol  
4
29th Energy Level
580.00 kJ/mol  
99+
1,130.00 kJ/mol  
4
30th Energy Level
0.00 kJ/mol  
99+
663.20 kJ/mol  
33
Electrochemical Equivalent
3.10 g/amp-hr  
18
3.00 g/amp-hr  
21
Electron Work Function
4.90 eV  
12
4.90 eV  
12
Other Chemical Properties
-  
Ionization, Radioactive Isotopes, Radioactivity  
Atomic
Atomic Number
111  
7
110  
8
Electron Configuration
[Rn] 5f14 6d9 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
111  
7
110  
8
Number of Neutrons
161  
4
161  
4
Number of Electrons
111  
7
110  
8
Radius of an Atom
  
  
Atomic Radius
200.00 pm  
7
132.00 pm  
99+
Covalent Radius
126.00 pm  
99+
128.00 pm  
99+
Van der Waals Radius
280.00 pm  
6
0.00 pm  
99+
Atomic Weight
281.00 amu  
6
281.00 amu  
6
Atomic Volume
28.70 cm3/mol  
12
20.50 cm3/mol  
29
Adjacent Atomic Numbers
  
  
Previous Element
Darmstadtium
  
Meitnerium
  
Next Element
Copernicium
  
Roentgenium
  
Valence Electron Potential
11.90 (-eV)  
99+
0.00 (-eV)  
99+
Lattice Constant
0.00 pm  
99+
0.00 pm  
99+
Lattice Angles
-  
-  
Lattice C/A Ratio
1.90  
1
1.61  
19
Mechanical
Density
  
  
Density At Room Temperature
28.70 g/cm3  
6
35.00 g/cm3  
4
Density When Liquid (at m.p.)
28.70 g/cm3  
7
34.80 g/cm3  
5
Tensile Strength
65.00 MPa  
33
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)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
99+
0.00 (Pa)  
37
Elasticity properties
  
  
Shear Modulus
26.00 GPa  
36
33.00 GPa  
23
Bulk Modulus
0.00 GPa  
99+
38.00 GPa  
99+
Young's Modulus
12.70 GPa  
99+
0.00 GPa  
99+
Poisson Ratio
0.30  
14
0.25  
24
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
28.70  
8
34.80  
7
Magnetic Ordering
-  
-  
Permeability
0.00 H/m  
12
0.00 H/m  
17
Susceptibility
0.00  
24
0.00  
24
Electrical Properties
  
  
Electrical Property
-  
-  
Resistivity
0.20 nΩ·m  
99+
8.30 nΩ·m  
99+
Electrical Conductivity
0.00 106/cm Ω  
99+
0.00 106/cm Ω  
99+
Electron Affinity
50.00 kJ/mol  
26
-  
Thermal
Specific Heat
0.13 J/(kg K)  
40
0.10 J/(kg K)  
99+
Molar Heat Capacity
23.70 J/mol·K  
99+
27.30 J/mol·K  
23
Thermal Conductivity
0.10 W/m·K  
99+
0.00 W/m·K  
99+
Critical Temperature
1,100.00 K  
99+
1,323.00 K  
99+
Thermal Expansion
12.60 µm/(m·K)  
40
12.90 µm/(m·K)  
38
Enthalpy
  
  
Enthalpy of Vaporization
580.00 kJ/mol  
12
348.90 kJ/mol  
34
Enthalpy of Fusion
-  
-  
Enthalpy of Atomization
580.00 kJ/mol  
14
-  
Standard Molar Entropy
57.00 J/mol.K  
30
57.00 J/mol.K  
30
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