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Terbium vs Dubnium

Terbium
Dubnium
Dubnium vs Terbium


Periodic Table
Symbol
Tb  
Db  
Group Number
Not Available  
5  
13
Period Number
6  
7  
Block
f block  
d block  
Element Family
Lanthanide  
Transition Metal  
CAS Number
7440279  
99+
53850354  
14
Space Group Name
P63/mmc  
Not Available  
Space Group Number
194.00  
5
Not Available  
Facts
Interesting Facts
  • At times Terbium metal acts same as Calcium.
  • Terbium metal closely similar to Lanthanum metal.
  
  • IUPAC allotted a temporary name to Dubnium metal as “ Unnilpentium”.
  • In the production of Dubnium, thermal gradient chromatography is used.
  
Sources
Found in Minerals, Found with Other Rare Earth Metals, Mining, Ores of Minerals  
Produced by Bombarding Am243 with Ne22, Synthetically Produced  
History
  
  
Who Discovered
Carl Gustaf Mosander  
Joint Institute for Nuclear Research  
Discovery
In 1842  
In 1968  
Abundance
  
  
Abundance In Universe
5 * 10-8 %  
27
Not Available  
Abundance In Sun
~0.00000001 %  
29
~-9999 %  
Abundance In Meteorites
0.00 %  
99+
Not Available  
Abundance In Earth's Crust
0.00 %  
40
Not Available  
Abundance In Oceans
0.00 %  
99+
Not Available  
Uses
Uses & Benefits
  • Terbium salts are used in optical devices like laser devices.
  • Terbium’s alloy lengthens and shortens the magnetic field and this effect forms loudspeaker.
  
  • Currently known uses of Dubnium metal are limited to research purpose only.
  
Industrial Uses
Electronic Industry  
NA  
Medical Uses
NA  
NA  
Other Uses
Alloys  
Research Purposes  
Biological Properties
  
  
Toxicity
Low Toxic  
Unknown  
Present in Human Body
No  
No  
In Blood
Not Available  
0.00 Blood/mg dm-3  
37
In Bone
Not Available  
0.00 p.p.m.  
36
Physical Properties
Melting Point
1,356.00 °C  
33
Not Available  
Boiling Point
3,123.00 °C  
29
Not Available  
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Unknown  
Luster
Metallic  
Unknown Luster  
Hardness
  
  
Brinell Hardness
677.00 MPa  
17
Not Available  
Vickers Hardness
863.00 MPa  
13
Not Available  
Speed of Sound
2,620.00 m/s  
35
Not Available  
Optical Properties
  
  
Allotropes
No  
No  
α Allotropes
Not Available  
Not Available  
β Allotropes
Not Available  
Not Available  
γ Allotropes
Not Available  
Not Available  
Chemical Properties
Chemical Formula
Tb  
Db  
Isotopes
  
  
Known Isotopes
26  
13
10  
28
Electronegativity
  
  
Allred Rochow Electronegativity
1.10  
30
Not Available  
Electropositivity
  
  
Ionization Energies
  
  
1st Energy Level
603.40 kJ/mol  
99+
664.80 kJ/mol  
38
2nd Energy Level
1,174.80 kJ/mol  
99+
1,546.70 kJ/mol  
38
3rd Energy Level
2,417.00 kJ/mol  
99+
2,378.40 kJ/mol  
99+
4th Energy Level
4,203.00 kJ/mol  
31
3,298.80 kJ/mol  
99+
5th Energy Level
Not Available  
4,305.20 kJ/mol  
39
Electrochemical Equivalent
1.98 g/amp-hr  
31
Not Available  
Electron Work Function
3.00 eV  
36
Not Available  
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility  
Ionization, Radioactive Isotopes, Radioactivity  
Atomic Properties
Atomic Number
65  
99+
105  
13
Electron Configuration
[Xe] 4f9 6s2  
[Rn] 5f14 6d3 7s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Body Centered Cubic (BCC)  
Crystal Lattice
HCP-Crystal-Structure-of-Terbium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
65  
99+
105  
13
Number of Neutrons
94  
36
157  
7
Number of Electrons
65  
99+
105  
13
Radius of an Atom
  
  
Atomic Radius
177.00 pm  
17
139.00 pm  
39
Covalent Radius
194.00 pm  
16
149.00 pm  
35
Van der Waals Radius
221.00 pm  
22
Not Available  
Atomic Weight
158.93 amu  
99+
268.00 amu  
10
Atomic Volume
19.20 cm3/mol  
22
Not Available  
Adjacent Atomic Numbers
  
  
Previous Element
Gadolinium
  
Rutherfordium
  
Next Element
Dysprosium
  
Seaborgium
  
Valence Electron Potential
46.80 (-eV)  
33
Not Available  
Lattice Constant
360.10 pm  
36
Not Available  
Lattice Angles
π/2, π/2, 2 π/3  
NA  
Lattice C/A Ratio
1.58  
13
Not Available  
Mechanical Properties
Density
  
  
Density At Room Temperature
8.23 g/cm3  
99+
29.30 g/cm3  
5
Density When Liquid (at m.p.)
7.65 g/cm3  
30
Not Available  
Tensile Strength
60.00 MPa  
17
Not Available  
Viscosity
Not Available  
Not Available  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
29
Not Available  
Vapor Pressure at 2000 K
12.50 (Pa)  
8
Not Available  
Elasticity properties
  
  
Shear Modulus
22.10 GPa  
32
Not Available  
Bulk Modulus
38.70 GPa  
33
Not Available  
Young's Modulus
55.70 GPa  
34
Not Available  
Poisson Ratio
0.26  
21
Not Available  
Other Mechanical Properties
Ductile, Malleable  
Unknown  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
8.23  
39
Not Available  
Magnetic Ordering
Paramagnetic  
Unknown  
Electrical Properties
  
  
Electrical Property
Conductor  
Unknown  
Resistivity
1.15 nΩ·m  
99+
Not Available  
Electrical Conductivity
0.01 106/cm Ω  
99+
Not Available  
Electron Affinity
50.00 kJ/mol  
21
Not Available  
Thermal Properties
Specific Heat
0.18 J/(kg K)  
33
Not Available  
Molar Heat Capacity
28.91 J/mol·K  
9
Not Available  
Thermal Conductivity
11.10 W/m·K  
99+
Not Available  
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
10.30 µm/(m·K)  
38
Not Available  
Enthalpy
  
  
Enthalpy of Vaporization
330.90 kJ/mol  
26
Not Available  
Enthalpy of Fusion
10.80 kJ/mol  
34
Not Available  
Enthalpy of Atomization
314.00 kJ/mol  
33
Not Available  
Standard Molar Entropy
73.20 J/mol.K  
10
Not Available  
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