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Roentgenium vs Lutetium

Roentgenium
Lutetium
Lutetium vs Roentgenium


Periodic Table
Symbol
Rg  
Lu  
Group Number
11  
7
3  
15
Period Number
7  
6  
Block
d block  
f block  
Element Family
-  
Lanthanide  
CAS Number
54386242  
1
7439943  
99+
Space Group Name
-  
P63/mmc  
Space Group Number
194.00  
7
194.00  
7
Facts
Interesting Facts
Roentgenium is a highly unstable synthetic element.  
  • Metal dust of Lutetium element is highly explosive.
  • Lutetium metal is corrosion resistance and acts stable in air.
  
Sources
Synthetically Produced  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Gesellschaft für Schwerionenforschung  
Georges Urbain and Carl Auer von Welsbach  
Discovery
In 1994  
In 1906  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
31
Abundance In Sun
-  
0.00 %  
26
Abundance In Meteorites
-  
0.00 %  
99+
Abundance In Earth's Crust
-  
0.00 %  
99+
Abundance In Oceans
-  
0.00 %  
99+
Abundance In Humans
-  
0.00 %  
24
Uses
Uses & Benefits
  • Currently known uses of Roentgenium metal are limited to research purpose only.
  
  • Lutetium metal is used outside research. It has commercial uses like Industrial catalyst for cracking oil refineries of hydrocarbons .
  
Industrial Uses
-  
-  
Medical Uses
-  
-  
Other Uses
Research Purposes  
Alloys  
Biological Properties
  
  
Toxicity
-  
Low Toxic  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
37
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
-  
1,652.00 °C  
19
Boiling Point
2,800.00 °C  
38
3,402.00 °C  
20
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Silvery White  
Luster
Unknown Luster  
Metallic  
Hardness
  
  
Mohs Hardness
-  
4.50  
10
Brinell Hardness
700.00 MPa  
17
893.00 MPa  
11
Vickers Hardness
450.00 MPa  
38
1,160.00 MPa  
14
Speed of Sound
3,430.00 m/s  
32
5,200.00 m/s  
10
Optical Properties
  
  
Refractive Index
1.30  
99+
1.90  
18
Reflectivity
64.00 %  
19
60.00 %  
23
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Rg  
Lu  
Isotopes
  
  
Known Isotopes
1  
34
35  
4
Electronegativity
  
  
Pauling Electronegativity
0.00  
99+
1.27  
35
Sanderson Electronegativity
1.90  
13
1.27  
27
Allred Rochow Electronegativity
1.30  
25
1.14  
29
Mulliken-Jaffe Electronegativity
0.90  
99+
1.27  
34
Allen Electronegativity
0.80  
99+
1.27  
99+
Electropositivity
  
  
Pauling Electropositivity
2.20  
39
2.73  
20
Ionization Energies
  
  
1st Energy Level
1,022.70 kJ/mol  
3
523.50 kJ/mol  
99+
2nd Energy Level
2,074.40 kJ/mol  
10
1,340.00 kJ/mol  
99+
3rd Energy Level
3,077.90 kJ/mol  
24
2,022.30 kJ/mol  
99+
4th Energy Level
4,052.40 kJ/mol  
99+
4,370.00 kJ/mol  
38
5th Energy Level
5,306.70 kJ/mol  
99+
6,445.00 kJ/mol  
34
6th Energy Level
11,100.00 kJ/mol  
10
5,230.00 kJ/mol  
99+
7th Energy level
5,800.00 kJ/mol  
99+
5,230.00 kJ/mol  
99+
8th Energy Level
5,800.00 kJ/mol  
99+
5,230.00 kJ/mol  
99+
9th Energy Level
5,650.00 kJ/mol  
99+
5,230.00 kJ/mol  
99+
10th Energy Level
5,800.00 kJ/mol  
99+
5,230.00 kJ/mol  
99+
11th Energy Level
8,300.00 kJ/mol  
24
5,235.00 kJ/mol  
99+
12th Energy Level
8,300.00 kJ/mol  
99+
5,230.00 kJ/mol  
99+
13th Energy Level
8,700.00 kJ/mol  
16
5,230.00 kJ/mol  
99+
14th Energy Level
8,300.00 kJ/mol  
16
5,230.00 kJ/mol  
99+
15th Energy Level
87,000.00 kJ/mol  
9
52,300.00 kJ/mol  
99+
16th Energy Level
83,000.00 kJ/mol  
11
52,300.00 kJ/mol  
99+
17th Energy Level
830.80 kJ/mol  
30
523.50 kJ/mol  
99+
18th Energy Level
8,300.00 kJ/mol  
19
5,230.00 kJ/mol  
99+
19th Energy Level
580.00 kJ/mol  
99+
523.50 kJ/mol  
99+
20th Energy Level
580.00 kJ/mol  
99+
523.00 kJ/mol  
99+
21st Energy Level
5,800.00 kJ/mol  
21
523.50 kJ/mol  
99+
22nd Energy Level
580.00 kJ/mol  
99+
523.00 kJ/mol  
99+
23rd Energy Level
5,800.00 kJ/mol  
21
5,230.00 kJ/mol  
28
24th Energy Level
538.70 kJ/mol  
99+
523.50 kJ/mol  
99+
25th Energy Level
0.00 kJ/mol  
99+
523.00 kJ/mol  
99+
26th Energy Level
580.00 kJ/mol  
99+
523.50 kJ/mol  
99+
27th Energy Level
580.00 kJ/mol  
99+
523.50 kJ/mol  
99+
28th Energy Level
880.00 kJ/mol  
8
523.50 kJ/mol  
99+
29th Energy Level
580.00 kJ/mol  
99+
523.50 kJ/mol  
99+
30th Energy Level
0.00 kJ/mol  
99+
523.00 kJ/mol  
99+
Electrochemical Equivalent
3.10 g/amp-hr  
18
2.18 g/amp-hr  
27
Electron Work Function
4.90 eV  
12
3.30 eV  
99+
Other Chemical Properties
-  
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
111  
7
71  
99+
Electron Configuration
[Rn] 5f14 6d9 7s2  
[Xe] 6s2 4f14 5d1  
Crystal Structure
Body Centered Cubic (BCC)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
111  
7
71  
99+
Number of Neutrons
161  
4
104  
31
Number of Electrons
111  
7
71  
99+
Radius of an Atom
  
  
Atomic Radius
200.00 pm  
7
174.00 pm  
22
Covalent Radius
126.00 pm  
99+
187.00 pm  
20
Van der Waals Radius
280.00 pm  
6
221.00 pm  
27
Atomic Weight
281.00 amu  
6
174.97 amu  
40
Atomic Volume
28.70 cm3/mol  
12
17.78 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Darmstadtium
  
Ytterbium
  
Next Element
Copernicium
  
Hafnium
  
Valence Electron Potential
11.90 (-eV)  
99+
50.90 (-eV)  
27
Lattice Constant
0.00 pm  
99+
350.31 pm  
99+
Lattice Angles
-  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.90  
1
1.59  
32
Mechanical
Density
  
  
Density At Room Temperature
28.70 g/cm3  
6
9.84 g/cm3  
99+
Density When Liquid (at m.p.)
28.70 g/cm3  
7
9.30 g/cm3  
99+
Tensile Strength
65.00 MPa  
33
230.00 MPa  
18
Viscosity
0.00  
25
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
35
Vapor Pressure at 2000 K
0.00 (Pa)  
99+
3.18 (Pa)  
11
Elasticity properties
  
  
Shear Modulus
26.00 GPa  
36
27.20 GPa  
33
Bulk Modulus
0.00 GPa  
99+
47.60 GPa  
25
Young's Modulus
12.70 GPa  
99+
68.60 GPa  
32
Poisson Ratio
0.30  
14
0.26  
21
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
28.70  
8
9.84  
99+
Magnetic Ordering
-  
Paramagnetic  
Permeability
0.00 H/m  
12
0.00 H/m  
9
Susceptibility
0.00  
24
0.00  
14
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
0.20 nΩ·m  
99+
582.00 nΩ·m  
9
Electrical Conductivity
0.00 106/cm Ω  
99+
0.02 106/cm Ω  
99+
Electron Affinity
50.00 kJ/mol  
26
50.00 kJ/mol  
26
Thermal
Specific Heat
0.13 J/(kg K)  
40
0.15 J/(kg K)  
37
Molar Heat Capacity
23.70 J/mol·K  
99+
26.86 J/mol·K  
31
Thermal Conductivity
0.10 W/m·K  
99+
16.40 W/m·K  
99+
Critical Temperature
1,100.00 K  
99+
1,925.00 K  
23
Thermal Expansion
12.60 µm/(m·K)  
40
9.90 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
580.00 kJ/mol  
12
355.90 kJ/mol  
32
Enthalpy of Fusion
-  
18.70 kJ/mol  
13
Enthalpy of Atomization
580.00 kJ/mol  
14
398.00 kJ/mol  
26
Standard Molar Entropy
57.00 J/mol.K  
30
51.00 J/mol.K  
99+
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