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Meitnerium vs Polonium

Meitnerium
Polonium
Polonium vs Meitnerium


Periodic Table
Symbol
Mt  
Po  
Group Number
9  
9
16  
2
Period Number
7  
6  
Block
d block  
p block  
Element Family
Probably Transition  
Post-​Transition  
CAS Number
54038016  
10
7440086  
99+
Space Group Name
-  
Pm-3m  
Space Group Number
166.00  
9
221.00  
4
Facts
Interesting Facts
Meitnerium is named after Lise Meitner, an Austrian physicist.  
  • 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
Bombarding Bi209 with Accelerated Nuclei of Fe58, Synthetically Produced  
Mining, Ores of metals  
History
  
  
Who Discovered
Gesellschaft für Schwerionenforschung  
Pierre Curie and Marie Curie  
Discovery
In 1982  
In 1898  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
40
Abundance In Sun
-  
-  
Abundance In Meteorites
0.00 %  
99+
-  
Abundance In Earth's Crust
-  
0.00 %  
99+
Abundance In Oceans
-  
0.00 %  
99+
Abundance In Humans
-  
0.00 %  
24
Uses
Uses & Benefits
  • Currently known uses of Meitnerium metal are limited to research purpose only.
  
  • 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, Ammunition Industry  
Medical Uses
-  
-  
Other Uses
-  
Alloys  
Biological Properties
  
  
Toxicity
-  
Highly Toxic  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
40
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
-  
254.00 °C  
99+
Boiling Point
0.00 °C  
99+
962.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
-  
Silver  
Luster
Unknown Luster  
-  
Hardness
  
  
Mohs Hardness
-  
2.50  
15
Brinell Hardness
400.00 MPa  
34
70.00 MPa  
99+
Vickers Hardness
350.00 MPa  
99+
30.00 MPa  
99+
Speed of Sound
3,200.00 m/s  
35
2,260.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.30  
99+
2.70  
3
Reflectivity
68.00 %  
15
50.00 %  
31
Allotropes
No  
Yes  
α Allotropes
-  
α-polonium  
β Allotropes
-  
β-polonium  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Mt  
Po  
Isotopes
  
  
Known Isotopes
4  
33
29  
10
Electronegativity
  
  
Pauling Electronegativity
1.30  
33
2.00  
8
Sanderson Electronegativity
1.90  
13
2.00  
10
Allred Rochow Electronegativity
1.30  
25
1.76  
3
Mulliken-Jaffe Electronegativity
1.30  
33
2.48  
1
Allen Electronegativity
1.30  
40
2.19  
2
Electropositivity
  
  
Pauling Electropositivity
2.00  
99+
2.00  
99+
Ionization Energies
  
  
1st Energy Level
800.80 kJ/mol  
15
812.10 kJ/mol  
14
2nd Energy Level
1,823.60 kJ/mol  
18
1,833.20 kJ/mol  
17
3rd Energy Level
2,904.20 kJ/mol  
31
812.10 kJ/mol  
99+
4th Energy Level
3,859.40 kJ/mol  
99+
8,121.00 kJ/mol  
7
5th Energy Level
4,920.80 kJ/mol  
99+
8,120.00 kJ/mol  
12
6th Energy Level
8,000.00 kJ/mol  
34
8,120.00 kJ/mol  
32
7th Energy level
8,000.00 kJ/mol  
28
8,120.00 kJ/mol  
26
8th Energy Level
8,000.00 kJ/mol  
28
8,120.00 kJ/mol  
26
9th Energy Level
6,700.00 kJ/mol  
36
8,120.00 kJ/mol  
23
10th Energy Level
5,800.00 kJ/mol  
99+
8,120.00 kJ/mol  
27
11th Energy Level
6,300.00 kJ/mol  
99+
8,120.00 kJ/mol  
26
12th Energy Level
0.00 kJ/mol  
99+
8,120.00 kJ/mol  
99+
13th Energy Level
8,000.00 kJ/mol  
20
8,120.00 kJ/mol  
19
14th Energy Level
1,156.00 kJ/mol  
99+
8,120.00 kJ/mol  
18
15th Energy Level
80,000.00 kJ/mol  
17
81,200.00 kJ/mol  
15
16th Energy Level
58,700.00 kJ/mol  
39
81,200.00 kJ/mol  
12
17th Energy Level
1,110.00 kJ/mol  
20
812.10 kJ/mol  
32
18th Energy Level
8,000.00 kJ/mol  
23
8,120.00 kJ/mol  
21
19th Energy Level
1,110.00 kJ/mol  
17
812.10 kJ/mol  
29
20th Energy Level
850.00 kJ/mol  
18
812.00 kJ/mol  
22
21st Energy Level
800.00 kJ/mol  
99+
812.10 kJ/mol  
40
22nd Energy Level
380.00 kJ/mol  
99+
812.00 kJ/mol  
17
23rd Energy Level
8,000.00 kJ/mol  
9
812.10 kJ/mol  
99+
24th Energy Level
565.60 kJ/mol  
99+
812.10 kJ/mol  
13
25th Energy Level
800.00 kJ/mol  
13
812.10 kJ/mol  
11
26th Energy Level
800.00 kJ/mol  
13
812.10 kJ/mol  
11
27th Energy Level
800.00 kJ/mol  
12
812.10 kJ/mol  
10
28th Energy Level
800.00 kJ/mol  
18
812.10 kJ/mol  
16
29th Energy Level
800.00 kJ/mol  
18
812.10 kJ/mol  
15
30th Energy Level
800.00 kJ/mol  
13
812.00 kJ/mol  
11
Electrochemical Equivalent
3.00 g/amp-hr  
21
3.90 g/amp-hr  
8
Electron Work Function
4.90 eV  
12
4.50 eV  
19
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
109  
9
84  
32
Electron Configuration
[Rn] 5f14 6d7 7s2  
[Xe] 4f14 5d10 6s2 6p4  
Crystal Structure
Face Centered Cubic (FCC)  
Monoclinic (MON)  
Crystal Lattice
FCC-Crystal-Structure-of-Meitnerium.jpg#100  
MON-Crystal-Structure-of-Polonium.jpg#100  
Atom
  
  
Number of Protons
109  
9
84  
32
Number of Neutrons
157  
8
125  
20
Number of Electrons
109  
9
84  
32
Radius of an Atom
  
  
Atomic Radius
122.00 pm  
99+
168.00 pm  
25
Covalent Radius
129.00 pm  
99+
140.00 pm  
99+
Van der Waals Radius
260.00 pm  
9
197.00 pm  
36
Atomic Weight
278.00 amu  
7
209.00 amu  
28
Atomic Volume
20.20 cm3/mol  
30
22.23 cm3/mol  
22
Adjacent Atomic Numbers
  
  
Previous Element
Hassium
  
Bismuth
  
Next Element
Darmstadtium
  
Francium
  
Valence Electron Potential
31.20 (-eV)  
99+
9.30 (-eV)  
99+
Lattice Constant
0.00 pm  
99+
335.90 pm  
99+
Lattice Angles
-  
π/2, π/2, π/2  
Lattice C/A Ratio
1.59  
27
1.46  
99+
Mechanical
Density
  
  
Density At Room Temperature
37.40 g/cm3  
2
9.20 g/cm3  
99+
Density When Liquid (at m.p.)
37.40 g/cm3  
2
9.40 g/cm3  
99+
Tensile Strength
80.00 MPa  
29
50.00 MPa  
38
Viscosity
0.00  
25
0.00  
26
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
37
0.00 (Pa)  
37
Elasticity properties
  
  
Shear Modulus
35.00 GPa  
21
24.00 GPa  
40
Bulk Modulus
0.00 GPa  
99+
46.00 GPa  
28
Young's Modulus
13.50 GPa  
99+
46.00 GPa  
99+
Poisson Ratio
0.25  
24
0.23  
30
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
37.40  
4
9.32  
99+
Magnetic Ordering
Paramagnetic  
Nonmagnetic  
Permeability
0.00 H/m  
12
0.00 H/m  
15
Susceptibility
0.00  
24
0.00  
24
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
0.35 nΩ·m  
99+
0.40 nΩ·m  
99+
Electrical Conductivity
0.00 106/cm Ω  
99+
0.02 106/cm Ω  
99+
Electron Affinity
50.00 kJ/mol  
26
183.30 kJ/mol  
3
Thermal
Specific Heat
0.10 J/(kg K)  
99+
0.12 J/(kg K)  
99+
Molar Heat Capacity
27.00 J/mol·K  
29
26.40 J/mol·K  
36
Thermal Conductivity
0.00 W/m·K  
99+
20.00 W/m·K  
99+
Critical Temperature
1,323.00 K  
99+
527.00 K  
99+
Thermal Expansion
10.30 µm/(m·K)  
99+
23.50 µm/(m·K)  
16
Enthalpy
  
  
Enthalpy of Vaporization
110.00 kJ/mol  
99+
60.30 kJ/mol  
99+
Enthalpy of Fusion
-  
13.00 kJ/mol  
32
Enthalpy of Atomization
350.20 kJ/mol  
37
134.00 kJ/mol  
99+
Standard Molar Entropy
63.80 J/mol.K  
22
41.10 J/mol.K  
99+
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