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Properties of Francium and Tantalum

Francium
Tantalum
Properties of Tantalum & Francium


Physical Properties
Melting Point
27.00 °C   
99+
2,996.00 °C   
4
Boiling Point
677.00 °C   
99+
5,425.00 °C   
4
Hardness
  
  
Mohs Hardness
Not Available   
6.50   
5
Brinell Hardness
Not Available   
440.00 MPa   
28
Vickers Hardness
Not Available   
870.00 MPa   
12
Optical Properties
  
  
Refractive Index
Not Available   
Not Available   
Reflectivity
Not Available   
78.00 %   
6
Speed of Sound
Not Available   
3,400.00 m/s   
22
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
Fr   
Ta   
Isotopes
  
  
Known Isotopes
33   
6
31   
8
Electronegativity
  
  
Pauling Electronegativity
0.70   
99+
1.50   
27
Sanderson Electronegativity
Not Available   
Not Available   
Allred Rochow Electronegativity
0.86   
99+
1.33   
22
Mulliken-Jaffe Electronegativity
0.68   
25
Not Available   
Allen Electronegativity
0.67   
99+
1.34   
33
Electropositivity
  
  
Pauling Electropositivity
3.30   
1
2.50   
27
Ionization Energies
  
  
1st Energy Level
380.00 kJ/mol   
99+
761.00 kJ/mol   
18
2nd Energy Level
Not Available   
1,500.00 kJ/mol   
40
3rd Energy Level
Not Available   
Not Available   
Electrochemical Equivalent
8.32 g/amp-hr   
1
1.35 g/amp-hr   
99+
Electron Work Function
Not Available   
4.25 eV   
21
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, 
?
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, 
?
Solubility is a chemical property referring to the ability for a given substance, the solute, to dissolve in a solvent.Solubility   
?
Anti-corrosion metals have the protection on their surfaces which protect them from corroding in corrosive environments.Anti Corrosion, 
?
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, 
?
Solubility is a chemical property referring to the ability for a given substance, the solute, to dissolve in a solvent.Solubility   
Mechanical Properties
Density
  
  
Density At Room Temperature
1.87 g/cm3   
99+
16.69 g/cm3   
18
Density When Liquid (at m.p.)
Not Available   
15.00 g/cm3   
9
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available   
Not Available   
Vapor Pressure at 2000 K
Not Available   
0.00 (Pa)   
31
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Elasticity properties
  
  
Shear Modulus
Not Available   
69.00 GPa   
13
Bulk Modulus
Not Available   
200.00 GPa   
8
Young's Modulus
Not Available   
186.00 GPa   
13
Poisson Ratio
Not Available   
0.34   
10
Other Mechanical Properties
NA   
?
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   
Periodic Table
Symbol
Fr   
Ta   
Group Number
1   
17
5   
13
Period Number
7   
6   
Block
?
The s-block is on the left side of the periodic table that includes elements from the first two columns, the alkali metals (group 1) and alkaline earth metals (group 2), plus helium.s block   
?
The d-block is on the middle of the periodic table and includes elements from columns 3 through 12. These elements are also known as the transition metals because they show a transitivity in their properties i.e. they show a trend in their properties.d block   
Element Family
?
All alkali metals are placed under group number 1 and s-block of periodic table. These metals are highly reactive and are found in ores of other metals and minerals. Alkali metals can be easily distinguished from others as these metals have only 1 electronAlkali   
?
What is Transition Metal? All transition metals are placed under the d-block from group number 3 to 12. Transition metals show characteristics like malleability, ductility and are good conductor of electricity.Transition Metal   
Atomic Properties
Atomic Number
87   
31
73   
99+
Atomic Weight
223.00 amu   
27
180.95 amu   
38
Atomic Volume
Not Available   
10.90 cm3/mol   
99+
Electron Configuration
[Rn] 7s1   
[Xe] 4f14 5d3 6s2   
Valence Electron Potential
8.00 (-eV)   
99+
110.00 (-eV)   
7
Atom
  
  
Number of Protons
87   
31
73   
99+
Number of Neutrons
136   
17
108   
28
Number of Electrons
87   
31
73   
99+
Crystal Structure
?
BCC is a basis type of cubic crystal structure. In crystallography, the cubic crystals structure is a crystal system where the unit cell has a cube shaped structure. This is one of the simplest crystal structure found in crystals of metal.Body Centered Cubic (BCC)   
?
BCC is a basis type of cubic crystal structure. In crystallography, the cubic crystals structure is a crystal system where the unit cell has a cube shaped structure. This is one of the simplest crystal structure found in crystals of metal.Body Centered Cubic (BCC)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Radius of an Atom
  
  
Atomic Radius
Not Available   
146.00 pm   
35
Covalent Radius
260.00 pm   
1
170.00 pm   
25
Van der Waals Radius
348.00 pm   
1
200.00 pm   
28
Lattice Constant
Not Available   
330.13 pm   
99+
Lattice Angles
NA   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
Adjacent Atomic Numbers
  
  
Next Element
Radium
  
Tungsten
  
Previous Element
Polonium
  
Hafnium
  
Magnetic Properties
Electrical Properties
  
  
Resistivity
3.00 nΩ·m   
99+
131.00 nΩ·m   
25
Electrical Conductivity
0.03 106/cm Ω   
40
0.08 106/cm Ω   
27
Electron Affinity
Not Available   
31.00 kJ/mol   
29
Electrical Property
?
Poor conductor metals have moderate resistance to electric currents. They can conduct electric current through them with very low efficiency.Poor Conductor   
?
Conductor metals have very low resistance to electric currents. They can easily conduct electric current through them.Conductor   
Magnetic Characteristics
  
  
Specific Gravity
Not Available   
16.65   
11
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
Not Available   
0.14 J/(kg K)   
37
Thermal Conductivity
15.00 W/m·K   
99+
57.50 W/m·K   
27
Critical Temperature
Not Available   
Not Available   
Molar Heat Capacity
Not Available   
25.36 J/mol·K   
99+
Thermal Expansion
Not Available   
6.30 µm/(m·K)   
99+
Standard Molar Entropy
Not Available   
41.50 J/mol.K   
37
Enthalpy
  
  
Enthalpy of Vaporization
Not Available   
753.10 kJ/mol   
2
Enthalpy of Fusion
Not Available   
31.40 kJ/mol   
3
Enthalpy of Atomization
71.00 kJ/mol   
99+
782.00 kJ/mol   
3
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