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Properties of Osmium and Radium

Osmium
Radium
Properties of Radium & Osmium


Physical Properties
Melting Point
3,045.00 °C   
3
700.00 °C   
99+
Boiling Point
5,027.00 °C   
6
1,737.00 °C   
99+
Hardness
  
  
Mohs Hardness
7.00   
3
Not Available   
Brinell Hardness
3,490.00 MPa   
1
Not Available   
Vickers Hardness
Not Available   
Not Available   
Optical Properties
  
  
Refractive Index
Not Available   
Not Available   
Reflectivity
Not Available   
Not Available   
Speed of Sound
4,940.00 m/s   
11
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
Os   
Ra   
Isotopes
  
  
Known Isotopes
35   
4
33   
6
Electronegativity
  
  
Pauling Electronegativity
2.20   
4
0.90   
99+
Sanderson Electronegativity
Not Available   
Not Available   
Allred Rochow Electronegativity
1.52   
12
0.97   
38
Mulliken-Jaffe Electronegativity
Not Available   
0.92   
20
Allen Electronegativity
1.65   
19
0.89   
99+
Electropositivity
  
  
Pauling Electropositivity
1.80   
99+
3.10   
5
Ionization Energies
  
  
1st Energy Level
840.00 kJ/mol   
12
509.30 kJ/mol   
99+
2nd Energy Level
1,309.80 kJ/mol   
99+
979.00 kJ/mol   
99+
3rd Energy Level
1,600.00 kJ/mol   
99+
Not Available   
Electrochemical Equivalent
1.77 g/amp-hr   
38
4.22 g/amp-hr   
6
Electron Work Function
4.83 eV   
8
Not Available   
Other Chemical Properties
?
Stable metals are non radioactive metals and have zero valence electrons in the outer shell.Chemical Stability, 
?
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, 
?
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
22.59 g/cm3   
9
5.50 g/cm3   
99+
Density When Liquid (at m.p.)
20.00 g/cm3   
1
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available   
Not Available   
Vapor Pressure at 2000 K
0.00 (Pa)   
28
Not Available   
Tensile Strength
1,000.00 MPa   
4
Not Available   
Viscosity
Not Available   
Not Available   
Elasticity properties
  
  
Shear Modulus
222.00 GPa   
1
Not Available   
Bulk Modulus
462.00 GPa   
1
Not Available   
Young's Modulus
Not Available   
Not Available   
Poisson Ratio
0.25   
24
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   
NA   
Periodic Table
Symbol
Os   
Ra   
Group Number
8   
10
2   
16
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 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   
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   
?
All alkaline earth metals are placed under group number 2 and s-block of periodic table. These metals are somewhat reactive at standard conditions. Alkaline earth metals appear shiny, silvery-white and are found in the earth’s crust.Alkaline Earth   
Atomic Properties
Atomic Number
76   
40
88   
30
Atomic Weight
190.23 amu   
35
226.00 amu   
26
Atomic Volume
8.49 cm3/mol   
99+
45.20 cm3/mol   
4
Electron Configuration
[Xe] 4f14 5d6 6s2   
[Rn] 7s2   
Valence Electron Potential
91.40 (-eV)   
12
20.10 (-eV)   
99+
Atom
  
  
Number of Protons
76   
39
88   
30
Number of Neutrons
114   
25
138   
16
Number of Electrons
76   
39
88   
30
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)   
?
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
133.80 pm   
99+
Not Available   
Covalent Radius
Not Available   
221.00 pm   
3
Van der Waals Radius
216.00 pm   
24
283.00 pm   
4
Lattice Constant
273.44 pm   
99+
514.80 pm   
13
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   
Lattice C/A Ratio
1.58   
14
Not Available   
Adjacent Atomic Numbers
  
  
Next Element
Iridium
  
Actinium
  
Previous Element
Rhenium
  
Francium
  
Magnetic Properties
Electrical Properties
  
  
Resistivity
81.20 nΩ·m   
35
100.00 nΩ·m   
31
Electrical Conductivity
0.11 106/cm Ω   
18
Not Available   
Electron Affinity
106.10 kJ/mol   
9
Not Available   
Electrical Property
?
Conductor metals have very low resistance to electric currents. They can easily conduct electric current through them.Conductor   
NA   
Magnetic Characteristics
  
  
Specific Gravity
22.57   
2
5.00   
99+
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   
?
Nonmagnetic metals are non magnetic in nature and do not show or exhibit any magnetic properties.Nonmagnetic   
Permeability
Not Available   
Not Available   
Susceptibility
Not Available   
Not Available   
Thermal Properties
Specific Heat
0.13 J/(kg K)   
39
0.12 J/(kg K)   
40
Thermal Conductivity
87.60 W/m·K   
19
18.60 W/m·K   
99+
Critical Temperature
Not Available   
Not Available   
Molar Heat Capacity
24.70 J/mol·K   
99+
Not Available   
Thermal Expansion
5.10 µm/(m·K)   
99+
Not Available   
Standard Molar Entropy
32.60 J/mol.K   
99+
71.00 J/mol.K   
14
Enthalpy
  
  
Enthalpy of Vaporization
627.60 kJ/mol   
7
Not Available   
Enthalpy of Fusion
29.30 kJ/mol   
4
Not Available   
Enthalpy of Atomization
669.00 kJ/mol   
6
163.00 kJ/mol   
99+
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