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Meitnerium vs Promethium

Meitnerium
Promethium
Promethium vs Meitnerium


Periodic Table
Symbol
Mt   
Pm   
Group Number
9   
9
Not Available   
Period Number
7   
6   
Block
d block   
f block   
Element Family
Probably Transition   
Lanthanide   
CAS Number
54038016   
10
7440122   
99+
Space Group Name
Not Available   
Not Available   
Space Group Number
Not Available   
Not Available   
Facts
Interesting Facts
Not Available   
  • Promethium metal found in Pitchblende.
  • Promethium metal is highly radioactive metal.
  
Sources
Bombarding Bi209 with Accelerated Nuclei of Fe58, Synthetically Produced   
Found in Minerals, Mining   
History
  
  
Who Discovered
Gesellschaft für Schwerionenforschung   
Chien Shiung Wu, Emilio Segrè, Hans Bethe   
Discovery
In 1982   
In 1942   
Abundance
  
  
Uses
Uses & Benefits
  • Currently known uses of Meitnerium metal are limited to research purpose only.
  
  • It is used for research purpose. Very small amount of this metal is used in atomic batteries.
  • Its radioactive decay is used for a phosphor to give off light. The light emitted is converted into electricity.
  
Industrial Uses
NA   
NA   
Medical Uses
NA   
NA   
Other Uses
NA   
NA   
Biological Properties
  
  
Toxicity
Unknown   
Non Toxic   
Present in Human Body
No   
No   
In Blood
0.00 Blood/mg dm-3   
37
0.00 Blood/mg dm-3   
37
In Bone
0.00 p.p.m.   
36
Not Available   
Physical Properties
Melting Point
Not Available   
1,042.00 °C   
99+
Boiling Point
Not Available   
3,000.00 °C   
31
Appearance
  
  
Physical State
Solid   
Solid   
Luster
Unknown Luster   
Metallic   
Hardness
  
  
Speed of Sound
Not Available   
Not Available   
Optical Properties
  
  
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
Mt   
Pm   
Isotopes
  
  
Known Isotopes
4   
33
27   
12
Electronegativity
  
  
Allred Rochow Electronegativity
Not Available   
1.07   
32
Electropositivity
  
  
Ionization Energies
  
  
1st Energy Level
800.80 kJ/mol   
15
540.00 kJ/mol   
99+
2nd Energy Level
1,823.60 kJ/mol   
17
1,050.00 kJ/mol   
99+
3rd Energy Level
2,904.20 kJ/mol   
31
2,150.00 kJ/mol   
99+
4th Energy Level
3,859.40 kJ/mol   
99+
3,970.00 kJ/mol   
38
5th Energy Level
4,920.80 kJ/mol   
35
Not Available   
Electrochemical Equivalent
Not Available   
1.80 g/amp-hr   
36
Electron Work Function
Not Available   
Not Available   
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Ionization, Radioactive Isotopes, Solubility   
Atomic Properties
Atomic Number
109   
9
61   
99+
Electron Configuration
[Rn] 5f14 6d7 7s2   
[Xe] 4f5 6s2   
Crystal Structure
Face Centered Cubic (FCC)   
Double Hexagonal Close Packed (DHCP)   
Crystal Lattice
FCC-Crystal-Structure-of-Meitnerium.jpg#100   
DHCP-Crystal-Structure-of-Promethium.jpg#100   
Atom
  
  
Number of Protons
109   
9
61   
99+
Number of Neutrons
157   
7
84   
40
Number of Electrons
109   
9
61   
99+
Radius of an Atom
  
  
Atomic Radius
122.00 pm   
99+
183.00 pm   
10
Covalent Radius
129.00 pm   
99+
199.00 pm   
12
Van der Waals Radius
Not Available   
236.00 pm   
16
Atomic Weight
278.00 amu   
7
145.00 amu   
99+
Atomic Volume
Not Available   
22.39 cm3/mol   
12
Adjacent Atomic Numbers
  
  
Previous Element
Hassium
  
Neodymium
  
Next Element
Darmstadtium
  
Samarium
  
Valence Electron Potential
Not Available   
44.10 (-eV)   
39
Lattice Constant
Not Available   
Not Available   
Lattice Angles
NA   
Unknown   
Lattice C/A Ratio
Not Available   
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
37.40 g/cm3   
2
7.26 g/cm3   
99+
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Elasticity properties
  
  
Shear Modulus
Not Available   
18.00 GPa   
36
Bulk Modulus
Not Available   
33.00 GPa   
36
Young's Modulus
Not Available   
46.00 GPa   
38
Poisson Ratio
Not Available   
0.28   
17
Other Mechanical Properties
NA   
NA   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
Not Available   
7.26   
99+
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Unknown   
Conductor   
Resistivity
Not Available   
0.75 nΩ·m   
99+
Electron Affinity
Not Available   
50.00 kJ/mol   
21
Thermal Properties
Specific Heat
Not Available   
0.18 J/(kg K)   
33
Molar Heat Capacity
Not Available   
Not Available   
Thermal Conductivity
Not Available   
17.90 W/m·K   
99+
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
Not Available   
9.00 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Fusion
Not Available   
7.50 kJ/mol   
99+
Enthalpy of Atomization
Not Available   
310.00 kJ/mol   
34
Standard Molar Entropy
Not Available   
Not Available   
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