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Properties of Tungsten and Mendelevium

Tungsten
Mendelevium
Properties of Mendelevium & Tungsten


Physical Properties
Melting Point
3,410.00 °C   
1
827.00 °C   
99+
Boiling Point
5,660.00 °C   
1
Not Available   
Hardness
  
  
Mohs Hardness
7.50   
2
Not Available   
Brinell Hardness
2,000.00 MPa   
4
Not Available   
Vickers Hardness
3,430.00 MPa   
1
Not Available   
Optical Properties
  
  
Refractive Index
Not Available   
Not Available   
Reflectivity
62.00 %   
13
Not Available   
Speed of Sound
4,620.00 m/s   
16
Not Available   
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
W   
Md   
Isotopes
  
  
Known Isotopes
33   
6
16   
23
Electronegativity
  
  
Pauling Electronegativity
2.36   
2
1.30   
32
Sanderson Electronegativity
0.98   
23
Not Available   
Allred Rochow Electronegativity
1.40   
19
1.20   
27
Mulliken-Jaffe Electronegativity
Not Available   
Not Available   
Allen Electronegativity
1.47   
29
Not Available   
Electropositivity
  
  
Pauling Electropositivity
1.64   
99+
2.70   
22
Ionization Energies
  
  
1st Energy Level
770.00 kJ/mol   
16
635.00 kJ/mol   
99+
2nd Energy Level
1,700.00 kJ/mol   
29
1,235.00 kJ/mol   
99+
3rd Energy Level
Not Available   
2,470.00 kJ/mol   
99+
Electrochemical Equivalent
1.14 g/amp-hr   
99+
3.21 g/amp-hr   
12
Electron Work Function
4.55 eV   
13
Not Available   
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
19.25 g/cm3   
16
Not Available   
Density When Liquid (at m.p.)
17.60 g/cm3   
5
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available   
Not Available   
Vapor Pressure at 2000 K
0.00 (Pa)   
32
Not Available   
Tensile Strength
370.00 MPa   
10
Not Available   
Viscosity
Not Available   
Not Available   
Elasticity properties
  
  
Shear Modulus
161.00 GPa   
5
Not Available   
Bulk Modulus
310.00 GPa   
4
Not Available   
Young's Modulus
411.00 GPa   
4
Not Available   
Poisson Ratio
0.28   
17
Not Available   
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   
Unknown   
Periodic Table
Symbol
W   
Md   
Group Number
6   
12
Not Available   
Period Number
6   
7   
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   
?
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
?
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   
?
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
74   
99+
101   
17
Atomic Weight
183.84 amu   
37
258.00 amu   
14
Atomic Volume
9.53 cm3/mol   
99+
Not Available   
Electron Configuration
[Xe] 4f14 5d4 6s2   
[Rn] 5f13 7s2   
Valence Electron Potential
140.00 (-eV)   
5
Not Available   
Atom
  
  
Number of Protons
74   
99+
101   
17
Number of Neutrons
110   
27
157   
7
Number of Electrons
74   
99+
101   
17
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)   
?
The crustal structure for this metal is Unknown or not yet discoveredNot Known   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
Unknown-Crystal-Structure-of-Mendelevium.jpg#100   
Radius of an Atom
  
  
Atomic Radius
139.00 pm   
39
Not Available   
Covalent Radius
162.00 pm   
29
Not Available   
Van der Waals Radius
200.00 pm   
28
246.00 pm   
8
Lattice Constant
316.52 pm   
99+
Not Available   
Lattice Angles
π/2, π/2, π/2   
NA   
Lattice C/A Ratio
Not Available   
Not Available   
Adjacent Atomic Numbers
  
  
Next Element
Rhenium
  
Nobelium
  
Previous Element
Tantalum
  
Fermium
  
Magnetic Properties
Electrical Properties
  
  
Resistivity
52.80 nΩ·m   
99+
Not Available   
Electrical Conductivity
0.19 106/cm Ω   
10
Not Available   
Electron Affinity
78.60 kJ/mol   
13
Not Available   
Electrical Property
?
Under certain conditions, superconductor metals offer zero resistance to electric current it means this type of metals will conduct electricity without any resistance.Superconductor   
Unknown   
Magnetic Characteristics
  
  
Specific Gravity
19.22   
9
Not Available   
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   
Unknown   
Permeability
Not Available   
Not Available   
Susceptibility
Not Available   
Not Available   
Thermal Properties
Specific Heat
0.13 J/(kg K)   
39
Not Available   
Thermal Conductivity
173.00 W/m·K   
7
Not Available   
Critical Temperature
Not Available   
Not Available   
Molar Heat Capacity
24.27 J/mol·K   
99+
Not Available   
Thermal Expansion
4.50 µm/(m·K)   
99+
Not Available   
Standard Molar Entropy
32.60 J/mol.K   
99+
Not Available   
Enthalpy
  
  
Enthalpy of Vaporization
799.10 kJ/mol   
1
Not Available   
Enthalpy of Fusion
35.23 kJ/mol   
1
Not Available   
Enthalpy of Atomization
837.00 kJ/mol   
1
Not Available   
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