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Properties of Terbium and Uranium

Terbium
Uranium
Properties of Uranium & Terbium


Physical Properties
Melting Point
1,356.00 °C   
33
1,132.00 °C   
39
Boiling Point
3,123.00 °C   
29
3,818.00 °C   
16
Hardness
  
  
Mohs Hardness
Not Available   
6.00   
6
Brinell Hardness
677.00 MPa   
17
2,350.00 MPa   
2
Vickers Hardness
863.00 MPa   
13
1,960.00 MPa   
2
Optical Properties
  
  
Refractive Index
Not Available   
Not Available   
Reflectivity
Not Available   
Not Available   
Speed of Sound
2,620.00 m/s   
35
3,155.00 m/s   
25
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   
U   
Isotopes
  
  
Known Isotopes
26   
13
25   
14
Electronegativity
  
  
Pauling Electronegativity
Not Available   
1.38   
28
Sanderson Electronegativity
Not Available   
Not Available   
Allred Rochow Electronegativity
1.10   
30
1.22   
26
Mulliken-Jaffe Electronegativity
Not Available   
Not Available   
Allen Electronegativity
Not Available   
Not Available   
Electropositivity
  
  
Pauling Electropositivity
Not Available   
2.62   
26
Ionization Energies
  
  
1st Energy Level
603.40 kJ/mol   
99+
597.60 kJ/mol   
99+
2nd Energy Level
1,174.80 kJ/mol   
99+
1,420.00 kJ/mol   
99+
3rd Energy Level
2,417.00 kJ/mol   
99+
1,900.00 kJ/mol   
99+
Electrochemical Equivalent
1.98 g/amp-hr   
31
1.48 g/amp-hr   
99+
Electron Work Function
3.00 eV   
36
3.63 eV   
30
Other Chemical Properties
?
Ionization is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons to form ions, often in conjunction with other chemical changes.Ionization, 
?
Radioactive metals emit particles and radiation from their nuclei. This process comes in the picture because their nuclei experience the intense conflict between two strong forces. This metal also have radioactive isotopes.Radioactive Isotopes, 
?
Solubility is a chemical property referring to the ability for a given substance, the solute, to dissolve in a solvent.Solubility   
?
Ionization is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons to form ions, often in conjunction with other chemical changes.Ionization, 
?
Radioactive metals emit particles and radiation from their nuclei. This process comes in the picture because their nuclei experience the intense conflict between two strong forces. This metal also have radioactive isotopes.Radioactive Isotopes, 
?
Radioactive metals emit particles and radiation from their nuclei. This process comes in the picture because their nuclei experience the intense conflict between two strong forces.Radioactivity   
Mechanical Properties
Density
  
  
Density At Room Temperature
8.23 g/cm3   
99+
19.10 g/cm3   
17
Density When Liquid (at m.p.)
7.65 g/cm3   
30
17.30 g/cm3   
7
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)   
29
Not Available   
Vapor Pressure at 2000 K
12.50 (Pa)   
8
0.01 (Pa)   
20
Tensile Strength
60.00 MPa   
17
Not Available   
Viscosity
Not Available   
Not Available   
Elasticity properties
  
  
Shear Modulus
22.10 GPa   
32
111.00 GPa   
10
Bulk Modulus
38.70 GPa   
33
100.00 GPa   
16
Young's Modulus
55.70 GPa   
34
208.00 GPa   
10
Poisson Ratio
0.26   
21
0.23   
30
Other Mechanical Properties
?
Ductility of metals defines their ability to deform under tensile stress; this is often characterized by the metals ability to be stretched into a wire.Ductile, 
?
Malleability of metals defines their ability to deform under compressive stress; this is often characterized by the metals ability to form a thin sheet by hammering or rolling.Malleable   
?
Ductility of metals defines their ability to deform under tensile stress; this is often characterized by the metals ability to be stretched into a wire.Ductile, 
?
Malleability of metals defines their ability to deform under compressive stress; this is often characterized by the metals ability to form a thin sheet by hammering or rolling.Malleable   
Periodic Table
Symbol
Tb   
U   
Group Number
Not Available   
0   
18
Period Number
6   
7   
Block
?
The f-block is in the center-left of a 32-column periodic table but in the footnoted appendage of 18-column tables. These elements are not generally considered as part of any group. They are often called inner transition metals.f block   
?
The f-block is in the center-left of a 32-column periodic table but in the footnoted appendage of 18-column tables. These elements are not generally considered as part of any group. They are often called inner transition metals.f block   
Element Family
?
Total 15 metals are included in Lanthanide series from Lanthanum to Lutetium. Lanthanide series is located under f and d block of the periodic table.Lanthanide   
?
Total 15 metals are included in actinide series, from Actinium to Lawrencium. Actinide series is located under f and d block of the periodic table.Actinide   
Atomic Properties
Atomic Number
65   
99+
92   
26
Atomic Weight
158.93 amu   
99+
238.03 amu   
21
Atomic Volume
19.20 cm3/mol   
22
12.59 cm3/mol   
40
Electron Configuration
[Xe] 4f9 6s2   
[Rn] 5f3 6d1 7s2   
Valence Electron Potential
46.80 (-eV)   
33
170.00 (-eV)   
4
Atom
  
  
Number of Protons
65   
99+
92   
26
Number of Neutrons
94   
36
146   
13
Number of Electrons
65   
99+
92   
26
Crystal Structure
?
The hexagonal crystal system consists of the 7 point groups such that all their space groups have the hexagonal lattice as underlying lattice. The hexagonal crystal family consists of the 12 point groups such that at least one of their space groups has theHexagonal Close Packed (HCP)   
?
Orthorhombic lattices occur due to stretching a cubic lattice along two of its orthogonal sides. It gets result in a rectangular prism with a rectangular at base. These 3 bases intersect each other at 90°.Orthorhombic (ORTH)   
Crystal Lattice
HCP-Crystal-Structure-of-Terbium.jpg#100   
ORTH-Crystal-Structure-of-Uranium.jpg#100   
Radius of an Atom
  
  
Atomic Radius
177.00 pm   
17
156.00 pm   
29
Covalent Radius
194.00 pm   
16
196.00 pm   
14
Van der Waals Radius
221.00 pm   
22
186.00 pm   
33
Lattice Constant
360.10 pm   
36
295.08 pm   
99+
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   
Lattice C/A Ratio
1.58   
13
Not Available   
Adjacent Atomic Numbers
  
  
Next Element
Dysprosium
  
Neptunium
  
Previous Element
Gadolinium
  
Protactinium
  
Magnetic Properties
Electrical Properties
  
  
Resistivity
1.15 nΩ·m   
99+
0.28 nΩ·m   
99+
Electrical Conductivity
0.01 106/cm Ω   
99+
0.04 106/cm Ω   
37
Electron Affinity
50.00 kJ/mol   
21
Not Available   
Electrical Property
?
Conductor metals have very low resistance to electric currents. They can easily conduct electric current through them.Conductor   
?
Poor conductor metals have moderate resistance to electric currents. They can conduct electric current through them with very low efficiency.Poor Conductor   
Magnetic Characteristics
  
  
Specific Gravity
8.23   
39
18.80   
10
Magnetic Ordering
?
Paramagnetic metals are slightly attracted by magnet, but they can’t retain the magnetic effect once they are removed from the magnetic field.Paramagnetic   
?
Paramagnetic metals are slightly attracted by magnet, but they can’t retain the magnetic effect once they are removed from the magnetic field.Paramagnetic   
Permeability
Not Available   
Not Available   
Susceptibility
Not Available   
Not Available   
Thermal Properties
Specific Heat
0.18 J/(kg K)   
33
0.12 J/(kg K)   
40
Thermal Conductivity
11.10 W/m·K   
99+
27.50 W/m·K   
40
Critical Temperature
Not Available   
Not Available   
Molar Heat Capacity
28.91 J/mol·K   
9
27.67 J/mol·K   
15
Thermal Expansion
10.30 µm/(m·K)   
38
13.90 µm/(m·K)   
27
Standard Molar Entropy
73.20 J/mol.K   
10
50.20 J/mol.K   
31
Enthalpy
  
  
Enthalpy of Vaporization
330.90 kJ/mol   
26
477.00 kJ/mol   
13
Enthalpy of Fusion
10.80 kJ/mol   
34
15.48 kJ/mol   
19
Enthalpy of Atomization
314.00 kJ/mol   
33
489.50 kJ/mol   
14
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