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Roentgenium vs Radium

Roentgenium
Radium
Radium vs Roentgenium


Periodic Table
Symbol
Rg  
Ra  
Group Number
11  
7
2  
16
Period Number
7  
7  
Block
d block  
s block  
Element Family
-  
Alkaline Earth  
CAS Number
54386242  
1
7440144  
99+
Space Group Name
-  
Im_ 3m  
Space Group Number
194.00  
7
229.00  
2
Facts
Interesting Facts
Roentgenium is a highly unstable synthetic element.  
  • Radium metal is the heaviest metal of Alkaline earth metals column.
  • Radium metal is highly radioactive and does not have any stable isotopes.
  
Sources
Synthetically Produced  
Mining, Ores of metals  
History
  
  
Who Discovered
Gesellschaft für Schwerionenforschung  
-  
Discovery
In 1994  
In 1898  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
40
Abundance In Sun
-  
0.00 %  
26
Abundance In Meteorites
-  
-  
Abundance In Earth's Crust
-  
0.00 %  
99+
Abundance In Oceans
-  
0.00 %  
99+
Abundance In Humans
-  
0.00 %  
23
Uses
Uses & Benefits
  • Currently known uses of Roentgenium metal are limited to research purpose only.
  
  • It is a highly radioactive metal; and sometime Radium-223 is used to treat prostate cancer.
  • It is used in luminous paints.
  
Industrial Uses
-  
-  
Medical Uses
-  
Pharmaceutical Industry  
Other Uses
Research Purposes  
-  
Biological Properties
  
  
Toxicity
-  
Highly Toxic  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
34
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
-  
700.00 °C  
99+
Boiling Point
2,800.00 °C  
38
1,737.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Silvery White  
Luster
Unknown Luster  
Metallic  
Hardness
  
  
Mohs Hardness
-  
1.00  
22
Brinell Hardness
700.00 MPa  
17
700.00 MPa  
17
Vickers Hardness
450.00 MPa  
38
140.00 MPa  
99+
Speed of Sound
3,430.00 m/s  
32
3,150.00 m/s  
37
Optical Properties
  
  
Refractive Index
1.30  
99+
1.00  
99+
Reflectivity
64.00 %  
19
83.00 %  
6
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Rg  
Ra  
Isotopes
  
  
Known Isotopes
1  
34
33  
6
Electronegativity
  
  
Pauling Electronegativity
0.00  
99+
0.90  
99+
Sanderson Electronegativity
1.90  
13
0.89  
99+
Allred Rochow Electronegativity
1.30  
25
0.97  
39
Mulliken-Jaffe Electronegativity
0.90  
99+
0.92  
99+
Allen Electronegativity
0.80  
99+
0.89  
99+
Electropositivity
  
  
Pauling Electropositivity
2.20  
39
3.10  
5
Ionization Energies
  
  
1st Energy Level
1,022.70 kJ/mol  
3
509.30 kJ/mol  
99+
2nd Energy Level
2,074.40 kJ/mol  
10
979.00 kJ/mol  
99+
3rd Energy Level
3,077.90 kJ/mol  
24
509.30 kJ/mol  
99+
4th Energy Level
4,052.40 kJ/mol  
99+
5,093.00 kJ/mol  
27
5th Energy Level
5,306.70 kJ/mol  
99+
5,090.00 kJ/mol  
99+
6th Energy Level
11,100.00 kJ/mol  
10
5,090.00 kJ/mol  
99+
7th Energy level
5,800.00 kJ/mol  
99+
5,090.00 kJ/mol  
99+
8th Energy Level
5,800.00 kJ/mol  
99+
5,090.00 kJ/mol  
99+
9th Energy Level
5,650.00 kJ/mol  
99+
5,090.00 kJ/mol  
99+
10th Energy Level
5,800.00 kJ/mol  
99+
5,090.00 kJ/mol  
99+
11th Energy Level
8,300.00 kJ/mol  
24
5,090.00 kJ/mol  
99+
12th Energy Level
8,300.00 kJ/mol  
99+
5,090.00 kJ/mol  
99+
13th Energy Level
8,700.00 kJ/mol  
16
5,090.00 kJ/mol  
99+
14th Energy Level
8,300.00 kJ/mol  
16
5,090.00 kJ/mol  
99+
15th Energy Level
87,000.00 kJ/mol  
9
50,900.00 kJ/mol  
99+
16th Energy Level
83,000.00 kJ/mol  
11
50,900.00 kJ/mol  
99+
17th Energy Level
830.80 kJ/mol  
30
509.30 kJ/mol  
99+
18th Energy Level
8,300.00 kJ/mol  
19
5,090.00 kJ/mol  
99+
19th Energy Level
580.00 kJ/mol  
99+
509.30 kJ/mol  
99+
20th Energy Level
580.00 kJ/mol  
99+
509.00 kJ/mol  
99+
21st Energy Level
5,800.00 kJ/mol  
21
509.30 kJ/mol  
99+
22nd Energy Level
580.00 kJ/mol  
99+
509.00 kJ/mol  
99+
23rd Energy Level
5,800.00 kJ/mol  
21
509.30 kJ/mol  
99+
24th Energy Level
538.70 kJ/mol  
99+
509.30 kJ/mol  
99+
25th Energy Level
0.00 kJ/mol  
99+
509.00 kJ/mol  
99+
26th Energy Level
580.00 kJ/mol  
99+
509.30 kJ/mol  
99+
27th Energy Level
580.00 kJ/mol  
99+
509.30 kJ/mol  
99+
28th Energy Level
880.00 kJ/mol  
8
509.30 kJ/mol  
99+
29th Energy Level
580.00 kJ/mol  
99+
509.30 kJ/mol  
99+
30th Energy Level
0.00 kJ/mol  
99+
509.00 kJ/mol  
99+
Electrochemical Equivalent
3.10 g/amp-hr  
18
4.22 g/amp-hr  
6
Electron Work Function
4.90 eV  
12
4.30 eV  
25
Other Chemical Properties
-  
Ionization, Radioactive Isotopes, Radioactivity  
Atomic
Atomic Number
111  
7
88  
30
Electron Configuration
[Rn] 5f14 6d9 7s2  
[Rn] 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
88  
30
Number of Neutrons
161  
4
138  
17
Number of Electrons
111  
7
88  
30
Radius of an Atom
  
  
Atomic Radius
200.00 pm  
7
215.00 pm  
6
Covalent Radius
126.00 pm  
99+
221.00 pm  
3
Van der Waals Radius
280.00 pm  
6
283.00 pm  
5
Atomic Weight
281.00 amu  
6
226.00 amu  
26
Atomic Volume
28.70 cm3/mol  
12
45.20 cm3/mol  
5
Adjacent Atomic Numbers
  
  
Previous Element
Darmstadtium
  
Francium
  
Next Element
Copernicium
  
Actinium
  
Valence Electron Potential
11.90 (-eV)  
99+
20.10 (-eV)  
99+
Lattice Constant
0.00 pm  
99+
514.80 pm  
15
Lattice Angles
-  
π/2, π/2, π/2  
Lattice C/A Ratio
1.90  
1
1.57  
99+
Mechanical
Density
  
  
Density At Room Temperature
28.70 g/cm3  
6
5.50 g/cm3  
99+
Density When Liquid (at m.p.)
28.70 g/cm3  
7
5.50 g/cm3  
99+
Tensile Strength
65.00 MPa  
33
40.00 MPa  
99+
Viscosity
0.00  
25
0.00  
2
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
16
Vapor Pressure at 2000 K
0.00 (Pa)  
99+
0.00 (Pa)  
33
Elasticity properties
  
  
Shear Modulus
26.00 GPa  
36
25.00 GPa  
38
Bulk Modulus
0.00 GPa  
99+
43.00 GPa  
33
Young's Modulus
12.70 GPa  
99+
83.00 GPa  
25
Poisson Ratio
0.30  
14
0.31  
13
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
28.70  
8
5.00  
99+
Magnetic Ordering
-  
Nonmagnetic  
Permeability
0.00 H/m  
12
0.00 H/m  
9
Susceptibility
0.00  
24
0.00  
18
Electrical Properties
  
  
Electrical Property
-  
-  
Resistivity
0.20 nΩ·m  
99+
100.00 nΩ·m  
31
Electrical Conductivity
0.00 106/cm Ω  
99+
0.00 106/cm Ω  
99+
Electron Affinity
50.00 kJ/mol  
26
0.90 kJ/mol  
99+
Thermal
Specific Heat
0.13 J/(kg K)  
40
0.12 J/(kg K)  
99+
Molar Heat Capacity
23.70 J/mol·K  
99+
20.05 J/mol·K  
99+
Thermal Conductivity
0.10 W/m·K  
99+
18.60 W/m·K  
99+
Critical Temperature
1,100.00 K  
99+
973.00 K  
99+
Thermal Expansion
12.60 µm/(m·K)  
40
8.50 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
580.00 kJ/mol  
12
113.00 kJ/mol  
99+
Enthalpy of Fusion
-  
8.60 kJ/mol  
99+
Enthalpy of Atomization
580.00 kJ/mol  
14
163.00 kJ/mol  
99+
Standard Molar Entropy
57.00 J/mol.K  
30
71.00 J/mol.K  
14
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