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Roentgenium vs Tantalum

Roentgenium
Tantalum
Tantalum vs Roentgenium


Periodic Table
Symbol
Rg  
Ta  
Group Number
11  
7
5  
13
Period Number
7  
6  
Block
d block  
d block  
Element Family
-  
Transition Metal  
CAS Number
54386242  
1
7440257  
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.  
  • Tantalum metal is known as corrosion resistance.
  • Tantalum metal can easily fabricated and It is a good conductor of heat and electricity.
  
Sources
Synthetically Produced  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Gesellschaft für Schwerionenforschung  
Anders Gustaf Ekeberg  
Discovery
In 1994  
In 1802  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
32
Abundance In Sun
-  
0.00 %  
18
Abundance In Meteorites
-  
0.00 %  
99+
Abundance In Earth's Crust
-  
0.00 %  
37
Abundance In Oceans
-  
0.00 %  
31
Abundance In Humans
-  
0.00 %  
24
Uses
Uses & Benefits
  • Currently known uses of Roentgenium metal are limited to research purpose only.
  
  • Tantalum metal is mainly used in the manufacturing of electron components. Its Oxide layer acts as an insulator.
  • Tantalum metal is also used in surgical transplant like replacement of bone, skull plates and as a woven gauze.
  
Industrial Uses
-  
Electrical Industry, Electronic Industry  
Medical Uses
-  
-  
Other Uses
Research Purposes  
Alloys  
Biological Properties
  
  
Toxicity
-  
Low Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
37
In Bone
0.00 p.p.m.  
99+
0.03 p.p.m.  
33
Physical
Melting Point
-  
2,996.00 °C  
4
Boiling Point
2,800.00 °C  
38
5,425.00 °C  
4
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Gray Blue  
Luster
Unknown Luster  
Metallic  
Hardness
  
  
Mohs Hardness
-  
6.50  
5
Brinell Hardness
700.00 MPa  
17
440.00 MPa  
33
Vickers Hardness
450.00 MPa  
38
870.00 MPa  
19
Speed of Sound
3,430.00 m/s  
32
3,400.00 m/s  
33
Optical Properties
  
  
Refractive Index
1.30  
99+
2.15  
10
Reflectivity
64.00 %  
19
78.00 %  
8
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Rg  
Ta  
Isotopes
  
  
Known Isotopes
1  
34
31  
8
Electronegativity
  
  
Pauling Electronegativity
0.00  
99+
1.50  
28
Sanderson Electronegativity
1.90  
13
1.50  
18
Allred Rochow Electronegativity
1.30  
25
1.33  
23
Mulliken-Jaffe Electronegativity
0.90  
99+
1.50  
26
Allen Electronegativity
0.80  
99+
1.34  
38
Electropositivity
  
  
Pauling Electropositivity
2.20  
39
2.50  
27
Ionization Energies
  
  
1st Energy Level
1,022.70 kJ/mol  
3
761.00 kJ/mol  
18
2nd Energy Level
2,074.40 kJ/mol  
10
1,500.00 kJ/mol  
99+
3rd Energy Level
3,077.90 kJ/mol  
24
761.00 kJ/mol  
99+
4th Energy Level
4,052.40 kJ/mol  
99+
7,610.00 kJ/mol  
9
5th Energy Level
5,306.70 kJ/mol  
99+
7,610.00 kJ/mol  
19
6th Energy Level
11,100.00 kJ/mol  
10
7,610.00 kJ/mol  
36
7th Energy level
5,800.00 kJ/mol  
99+
7,610.00 kJ/mol  
30
8th Energy Level
5,800.00 kJ/mol  
99+
7,610.00 kJ/mol  
30
9th Energy Level
5,650.00 kJ/mol  
99+
7,610.00 kJ/mol  
26
10th Energy Level
5,800.00 kJ/mol  
99+
7,610.00 kJ/mol  
30
11th Energy Level
8,300.00 kJ/mol  
24
7,610.00 kJ/mol  
29
12th Energy Level
8,300.00 kJ/mol  
99+
7,610.00 kJ/mol  
99+
13th Energy Level
8,700.00 kJ/mol  
16
7,610.00 kJ/mol  
22
14th Energy Level
8,300.00 kJ/mol  
16
7,610.00 kJ/mol  
19
15th Energy Level
87,000.00 kJ/mol  
9
76,100.00 kJ/mol  
19
16th Energy Level
83,000.00 kJ/mol  
11
76,100.00 kJ/mol  
14
17th Energy Level
830.80 kJ/mol  
30
761.00 kJ/mol  
35
18th Energy Level
8,300.00 kJ/mol  
19
7,610.00 kJ/mol  
25
19th Energy Level
580.00 kJ/mol  
99+
761.00 kJ/mol  
32
20th Energy Level
580.00 kJ/mol  
99+
761.00 kJ/mol  
26
21st Energy Level
5,800.00 kJ/mol  
21
761.00 kJ/mol  
99+
22nd Energy Level
580.00 kJ/mol  
99+
761.00 kJ/mol  
20
23rd Energy Level
5,800.00 kJ/mol  
21
761.00 kJ/mol  
99+
24th Energy Level
538.70 kJ/mol  
99+
761.00 kJ/mol  
16
25th Energy Level
0.00 kJ/mol  
99+
761.00 kJ/mol  
16
26th Energy Level
580.00 kJ/mol  
99+
761.00 kJ/mol  
16
27th Energy Level
580.00 kJ/mol  
99+
761.00 kJ/mol  
15
28th Energy Level
880.00 kJ/mol  
8
761.00 kJ/mol  
21
29th Energy Level
580.00 kJ/mol  
99+
761.00 kJ/mol  
22
30th Energy Level
0.00 kJ/mol  
99+
761.00 kJ/mol  
16
Electrochemical Equivalent
3.10 g/amp-hr  
18
1.35 g/amp-hr  
99+
Electron Work Function
4.90 eV  
12
4.25 eV  
28
Other Chemical Properties
-  
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Atomic
Atomic Number
111  
7
73  
99+
Electron Configuration
[Rn] 5f14 6d9 7s2  
[Xe] 4f14 5d3 6s2  
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
73  
99+
Number of Neutrons
161  
4
108  
29
Number of Electrons
111  
7
73  
99+
Radius of an Atom
  
  
Atomic Radius
200.00 pm  
7
146.00 pm  
37
Covalent Radius
126.00 pm  
99+
170.00 pm  
27
Van der Waals Radius
280.00 pm  
6
200.00 pm  
35
Atomic Weight
281.00 amu  
6
180.95 amu  
38
Atomic Volume
28.70 cm3/mol  
12
10.90 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Darmstadtium
  
Hafnium
  
Next Element
Copernicium
  
Tungsten
  
Valence Electron Potential
11.90 (-eV)  
99+
110.00 (-eV)  
7
Lattice Constant
0.00 pm  
99+
330.13 pm  
99+
Lattice Angles
-  
π/2, π/2, π/2  
Lattice C/A Ratio
1.90  
1
1.41  
99+
Mechanical
Density
  
  
Density At Room Temperature
28.70 g/cm3  
6
16.69 g/cm3  
18
Density When Liquid (at m.p.)
28.70 g/cm3  
7
15.00 g/cm3  
23
Tensile Strength
65.00 MPa  
33
180.00 MPa  
20
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)  
99+
Elasticity properties
  
  
Shear Modulus
26.00 GPa  
36
69.00 GPa  
13
Bulk Modulus
0.00 GPa  
99+
200.00 GPa  
8
Young's Modulus
12.70 GPa  
99+
186.00 GPa  
14
Poisson Ratio
0.30  
14
0.34  
10
Other Mechanical Properties
-  
Ductile  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
28.70  
8
16.65  
20
Magnetic Ordering
-  
Paramagnetic  
Permeability
0.00 H/m  
12
0.00 H/m  
17
Susceptibility
0.00  
24
0.00  
27
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
0.20 nΩ·m  
99+
131.00 nΩ·m  
25
Electrical Conductivity
0.00 106/cm Ω  
99+
0.08 106/cm Ω  
32
Electron Affinity
50.00 kJ/mol  
26
31.00 kJ/mol  
35
Thermal
Specific Heat
0.13 J/(kg K)  
40
0.14 J/(kg K)  
38
Molar Heat Capacity
23.70 J/mol·K  
99+
25.36 J/mol·K  
99+
Thermal Conductivity
0.10 W/m·K  
99+
57.50 W/m·K  
27
Critical Temperature
1,100.00 K  
99+
3,290.00 K  
4
Thermal Expansion
12.60 µm/(m·K)  
40
6.30 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
580.00 kJ/mol  
12
753.10 kJ/mol  
2
Enthalpy of Fusion
-  
31.40 kJ/mol  
3
Enthalpy of Atomization
580.00 kJ/mol  
14
782.00 kJ/mol  
3
Standard Molar Entropy
57.00 J/mol.K  
30
41.50 J/mol.K  
99+
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