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Vanadium vs Polonium

Vanadium
Polonium
Polonium vs Vanadium


Periodic Table
Symbol
V   
Po   
Group Number
5   
13
16   
2
Period Number
4   
6   
Block
d block   
p block   
Element Family
Transition Metal   
Post-​Transition   
CAS Number
7440622   
27
7440086   
99+
Space Group Name
Im_ 3m   
Pm-3m   
Space Group Number
229.00   
1
221.00   
3
Facts
Interesting Facts
  • Vanadium is a highly reactive metal, hence it is not found free in nature.
  • Vanadium can be found in almost 65 different types of minerals.
  
  • Polonium was the first radioactive element to be discovered.
  • Polonium element and its compounds are highly radioactive.
  • Its alloy with Beryllium provides source of neutrons.
  
Sources
Found As a By-product, Found in Minerals, Mining, Ores of Minerals   
Mining, Ores of metals   
History
  
  
Who Discovered
Andrés Manuel del Río   
Pierre Curie and Marie Curie   
Discovery
In 1801   
In 1898   
Abundance
  
  
Abundance In Universe
1 * 10-4 %   
10
Not Available   
Abundance In Sun
~0.00004 %   
13
~-9999 %   
Abundance In Meteorites
0.01 %   
14
Not Available   
Abundance In Earth's Crust
0.02 %   
12
Not Available   
Abundance In Oceans
0.00 %   
14
0.00 %   
99+
Abundance In Humans
0.00 %   
16
Not Available   
Uses
Uses & Benefits
  • Its ally with steel is used very tough and hence it is used in armor plates, axles, piston rods, tools and crankshafts.
  • Its oxide is used as pigments for glass and ceramics.
  
  • Polonium metal has different Allotropes, it is used in antistatic devices and for research purpose.
  • A 1 gram of Polonium can reach a temperature of 500°C, hence it is used as a heat source for space equipment.
  
Industrial Uses
Aerospace Industry, Automobile Industry, Chemical Industry   
Aerospace Industry, Ammunition Industry   
Medical Uses
NA   
NA   
Other Uses
Alloys   
Alloys   
Biological Properties
  
  
Toxicity
Toxic   
Highly Toxic   
Present in Human Body
Yes   
No   
In Blood
0.00 Blood/mg dm-3   
36
0.00 Blood/mg dm-3   
37
In Bone
0.00 p.p.m.   
31
0.00 p.p.m.   
36
Physical Properties
Melting Point
1,890.00 °C   
13
254.00 °C   
99+
Boiling Point
3,380.00 °C   
20
962.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Blue-Silver Grey   
Silver   
Luster
Metallic   
NA   
Hardness
  
  
Mohs Hardness
6.70   
4
Not Available   
Brinell Hardness
600.00 MPa   
20
Not Available   
Vickers Hardness
628.00 MPa   
17
Not Available   
Speed of Sound
4,560.00 m/s   
17
Not Available   
Optical Properties
  
  
Reflectivity
61.00 %   
14
Not Available   
Allotropes
No   
Yes   
α Allotropes
Not Available   
α-polonium   
β Allotropes
Not Available   
β-polonium   
γ Allotropes
Not Available   
Not Available   
Chemical Properties
Chemical Formula
V   
Po   
Isotopes
  
  
Known Isotopes
22   
17
29   
10
Electronegativity
  
  
Pauling Electronegativity
1.63   
20
2.00   
7
Sanderson Electronegativity
1.39   
17
Not Available   
Allred Rochow Electronegativity
1.45   
16
1.76   
2
Mulliken-Jaffe Electronegativity
Not Available   
2.48   
1
Allen Electronegativity
1.53   
26
2.19   
2
Electropositivity
  
  
Pauling Electropositivity
2.37   
34
2.00   
99+
Ionization Energies
  
  
1st Energy Level
650.90 kJ/mol   
99+
812.10 kJ/mol   
14
2nd Energy Level
1,414.00 kJ/mol   
99+
Not Available   
3rd Energy Level
2,830.00 kJ/mol   
35
Not Available   
4th Energy Level
4,507.00 kJ/mol   
25
Not Available   
5th Energy Level
6,298.70 kJ/mol   
23
Not Available   
6th Energy Level
12,363.00 kJ/mol   
5
Not Available   
7th Energy level
14,530.00 kJ/mol   
5
Not Available   
8th Energy Level
16,730.00 kJ/mol   
7
Not Available   
9th Energy Level
19,860.00 kJ/mol   
7
Not Available   
10th Energy Level
22,240.00 kJ/mol   
12
Not Available   
11th Energy Level
24,670.00 kJ/mol   
15
Not Available   
12th Energy Level
29,730.00 kJ/mol   
12
Not Available   
13th Energy Level
32,446.00 kJ/mol   
12
Not Available   
14th Energy Level
86,450.00 kJ/mol   
1
Not Available   
15th Energy Level
94,170.00 kJ/mol   
2
Not Available   
16th Energy Level
102,300.00 kJ/mol   
3
Not Available   
17th Energy Level
112,700.00 kJ/mol   
4
Not Available   
18th Energy Level
121,600.00 kJ/mol   
5
Not Available   
19th Energy Level
130,700.00 kJ/mol   
6
Not Available   
20th Energy Level
143,400.00 kJ/mol   
8
Not Available   
21st Energy Level
151,440.00 kJ/mol   
8
Not Available   
Electrochemical Equivalent
0.38 g/amp-hr   
99+
3.90 g/amp-hr   
8
Electron Work Function
4.30 eV   
18
Not Available   
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes   
Ionization, Radioactive Isotopes, Solubility   
Atomic Properties
Atomic Number
23   
99+
84   
32
Electron Configuration
[Ar] 3d3 4s2   
[Xe] 4f14 5d10 6s2 6p4   
Crystal Structure
Body Centered Cubic (BCC)   
Monoclinic (MON)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
MON-Crystal-Structure-of-Polonium.jpg#100   
Atom
  
  
Number of Protons
23   
99+
84   
32
Number of Neutrons
28   
99+
125   
19
Number of Electrons
23   
99+
84   
32
Radius of an Atom
  
  
Atomic Radius
134.00 pm   
99+
168.00 pm   
23
Covalent Radius
153.00 pm   
33
140.00 pm   
99+
Van der Waals Radius
200.00 pm   
28
197.00 pm   
29
Atomic Weight
50.94 amu   
99+
209.00 amu   
28
Atomic Volume
8.78 cm3/mol   
99+
22.23 cm3/mol   
13
Adjacent Atomic Numbers
  
  
Previous Element
Titanium
  
Bismuth
  
Next Element
Chromium
  
Francium
  
Valence Electron Potential
120.00 (-eV)   
6
Not Available   
Lattice Constant
303.00 pm   
99+
335.90 pm   
99+
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
6.00 g/cm3   
99+
9.20 g/cm3   
99+
Density When Liquid (at m.p.)
5.50 g/cm3   
99+
9.40 g/cm3   
19
Tensile Strength
800.00 MPa   
6
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 2000 K
0.23 (Pa)   
16
Not Available   
Elasticity properties
  
  
Shear Modulus
47.00 GPa   
16
Not Available   
Bulk Modulus
160.00 GPa   
11
Not Available   
Young's Modulus
128.00 GPa   
15
Not Available   
Poisson Ratio
0.37   
7
Not Available   
Other Mechanical Properties
Ductile, Malleable   
NA   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
5.96   
99+
9.32   
31
Magnetic Ordering
Paramagnetic   
Nonmagnetic   
Electrical Properties
  
  
Electrical Property
Superconductor   
Conductor   
Resistivity
197.00 nΩ·m   
19
0.40 nΩ·m   
99+
Electrical Conductivity
0.05 106/cm Ω   
35
0.02 106/cm Ω   
99+
Electron Affinity
50.60 kJ/mol   
20
183.30 kJ/mol   
3
Thermal Properties
Specific Heat
0.49 J/(kg K)   
10
0.12 J/(kg K)   
40
Molar Heat Capacity
24.89 J/mol·K   
99+
26.40 J/mol·K   
28
Thermal Conductivity
30.70 W/m·K   
39
20.00 W/m·K   
99+
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
8.40 µm/(m·K)   
99+
23.50 µm/(m·K)   
16
Enthalpy
  
  
Enthalpy of Vaporization
458.60 kJ/mol   
14
60.30 kJ/mol   
99+
Enthalpy of Fusion
17.57 kJ/mol   
14
13.00 kJ/mol   
26
Enthalpy of Atomization
514.60 kJ/mol   
13
134.00 kJ/mol   
99+
Standard Molar Entropy
28.90 J/mol.K   
99+
Not Available   
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