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Properties of Yttrium and Polonium


Properties of Polonium & Yttrium


Physical Properties

Melting Point
1,523.00 °C   
27
254.00 °C   
99+

Boiling Point
3,337.00 °C   
21
962.00 °C   
99+

Hardness
  
  

Mohs Hardness
Not Available   
Not Available   

Brinell Hardness
589.00 MPa   
22
Not Available   

Vickers Hardness
Not Available   
Not Available   

Optical Properties
  
  

Refractive Index
Not Available   
Not Available   

Reflectivity
Not Available   
Not Available   

Speed of Sound
3,300.00 m/s   
23
Not Available   

Allotropes
No   
Yes   

α Allotropes
Not Available   
?
simple cubic (metallic)Α-Polonium
  

β Allotropes
Not Available   
?
rhombohedral (metallic)Β-Polonium
  

γ Allotropes
Not Available   
Not Available   

Chemical Properties

Chemical Formula
Y   
Po   

Isotopes
  
  

Known Isotopes
19   
20
29   
10

Electronegativity
  
  

Pauling Electronegativity
1.22   
38
2.00   
7

Sanderson Electronegativity
0.65   
29
Not Available   

Allred Rochow Electronegativity
1.11   
29
1.76   
2

Mulliken-Jaffe Electronegativity
Not Available   
2.48   
1

Allen Electronegativity
1.12   
38
2.19   
2

Electropositivity
  
  

Pauling Electropositivity
2.78   
16
2.00   
99+

Ionization Energies
  
  

1st Energy Level
600.00 kJ/mol   
99+
812.10 kJ/mol   
14

2nd Energy Level
1,180.00 kJ/mol   
99+
Not Available   

3rd Energy Level
1,980.00 kJ/mol   
99+
Not Available   

Electrochemical Equivalent
1.11 g/amp-hr   
99+
3.90 g/amp-hr   
8

Electron Work Function
3.10 eV   
35
Not Available   

Other Chemical Properties
?
Stable metals are non radioactive metals and have zero valence electrons in the outer shell.Chemical Stability, 
?
Flammable metals have ability to burn or ignite, causing fire or combustion.Flammable, 
?
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, 
?
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
4.47 g/cm3   
99+
9.20 g/cm3   
99+

Density When Liquid (at m.p.)
4.24 g/cm3   
99+
9.40 g/cm3   
19

Vapor Pressure
  
  

Vapor Pressure at 1000 K
0.00 (Pa)   
32
Not Available   

Vapor Pressure at 2000 K
4.27 (Pa)   
10
Not Available   

Tensile Strength
Not Available   
Not Available   

Viscosity
Not Available   
Not Available   

Elasticity properties
  
  

Shear Modulus
25.60 GPa   
30
Not Available   

Bulk Modulus
41.20 GPa   
30
Not Available   

Young's Modulus
63.50 GPa   
32
Not Available   

Poisson Ratio
0.24   
26
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
Y   
Po   

Group Number
3   
15
16   
2

Period Number
5   
6   

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 p-block is on the right side of the periodic table and includes elements from the six columns beginning with column 13 and ending with column 18. Helium, though being in the top of group 18, is not included in the p-block.p 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 post transition metals are placed in group number 13, 14 and 15 of periodic table. In fact, they are located between Transition Metals and Metalloids. Post transition metals have very poor mechanical properties.Post-​Transition
  

Atomic Properties

Atomic Number
39   
99+
84   
32

Atomic Weight
88.91 amu   
99+
209.00 amu   
28

Atomic Volume
19.80 cm3/mol   
21
22.23 cm3/mol   
13

Electron Configuration
[Kr] 4d1 5s2   
[Xe] 4f14 5d10 6s2 6p4   

Valence Electron Potential
48.00 (-eV)   
30
Not Available   

Atom
  
  

Number of Protons
39   
99+
84   
32

Number of Neutrons
50   
99+
125   
19

Number of Electrons
39   
99+
84   
32

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)
  
?
The mono-clinic crystal structure is one of the seven lattice point groups. Here vectors of crystal have unequal lengths. Here vectors of crystal have unequal lengths and have two vectors perpendicular to the 3rd oneMonoclinic (MON)
  

Crystal Lattice
HCP-Crystal-Structure-of-Yttrium.jpg#100   
MON-Crystal-Structure-of-Polonium.jpg#100   

Radius of an Atom
  
  

Atomic Radius
180.00 pm   
14
168.00 pm   
23

Covalent Radius
190.00 pm   
18
140.00 pm   
99+

Van der Waals Radius
200.00 pm   
28
197.00 pm   
29

Lattice Constant
364.74 pm   
31
335.90 pm   
99+

Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   

Lattice C/A Ratio
1.57   
16
Not Available   

Adjacent Atomic Numbers
  
  

Next Element
Zirconium
  
Francium
  

Previous Element
Strontium
  
Bismuth
  

Magnetic Properties

Electrical Properties
  
  

Resistivity
596.00 nΩ·m   
8
0.40 nΩ·m   
99+

Electrical Conductivity
0.02 106/cm Ω   
99+
0.02 106/cm Ω   
99+

Electron Affinity
29.60 kJ/mol   
30
183.30 kJ/mol   
3

Electrical Property
?
Conductor metals have very low resistance to electric currents. They can easily conduct electric current through them.Conductor
  
?
Conductor metals have very low resistance to electric currents. They can easily conduct electric current through them.Conductor
  

Magnetic Characteristics
  
  

Specific Gravity
4.47   
99+
9.32   
31

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
0.30 J/(kg K)   
18
0.12 J/(kg K)   
40

Thermal Conductivity
17.20 W/m·K   
99+
20.00 W/m·K   
99+

Critical Temperature
Not Available   
Not Available   

Molar Heat Capacity
26.53 J/mol·K   
27
26.40 J/mol·K   
28

Thermal Expansion
10.60 µm/(m·K)   
37
23.50 µm/(m·K)   
16

Standard Molar Entropy
44.40 J/mol.K   
33
Not Available   

Enthalpy
  
  

Enthalpy of Vaporization
393.00 kJ/mol   
18
60.30 kJ/mol   
99+

Enthalpy of Fusion
17.15 kJ/mol   
16
13.00 kJ/mol   
26

Enthalpy of Atomization
418.00 kJ/mol   
18
134.00 kJ/mol   
99+

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