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Roentgenium Protactinium Comparison

Roentgenium
Protactinium
Protactinium Roentgenium comparison


Periodic Table
Symbol
Rg   
Pa   
Group Number
11   
7
Not Available   
Period Number
7   
7   
Block
d block   
f block   
Element Family
Unknown   
Actinide   
CAS Number
54386242   
1
7440133   
99+
Space Group Name
Not Available   
I4/mmm   
Space Group Number
194.00   
5
139.00   
8
Facts
Interesting Facts
Not Available   
  • Protactinium metal has 29 isotopes.
  • Isotopes of Protactinium-231 used in nuclear weapon.
  
Sources
Synthetically Produced   
Found in Uranium Ores, Mining, Ores of metals   
History
  
  
Who Discovered
Gesellschaft für Schwerionenforschung   
William Crookes   
Discovery
In 1994   
In 1900   
Abundance
  
  
Abundance In Earth's Crust
Not Available   
0.00 %   
99+
Abundance In Oceans
Not Available   
0.00 %   
99+
Uses
Uses & Benefits
  • Currently known uses of Roentgenium metal are limited to research purpose only.
  
  • Currently known uses of Protactinium metal are limited to research purpose only.
  
Industrial Uses
NA   
NA   
Medical Uses
NA   
NA   
Other Uses
Research Purposes   
NA   
Biological Properties
  
  
Toxicity
Unknown   
Highly 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
0.00 p.p.m.   
36
Physical Properties
Melting Point
Not Available   
1,568.00 °C   
21
Boiling Point
Not Available   
4,027.00 °C   
12
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silver   
Silver   
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
Rg   
Pa   
Isotopes
  
  
Known Isotopes
1   
34
27   
12
Electronegativity
  
  
Pauling Electronegativity
Not Available   
1.50   
27
Allred Rochow Electronegativity
Not Available   
1.14   
28
Electropositivity
  
  
Pauling Electropositivity
Not Available   
2.50   
27
Ionization Energies
  
  
1st Energy Level
1,022.70 kJ/mol   
3
568.00 kJ/mol   
99+
2nd Energy Level
2,074.40 kJ/mol   
10
1,128.00 kJ/mol   
99+
3rd Energy Level
3,077.90 kJ/mol   
24
1,814.00 kJ/mol   
99+
4th Energy Level
4,052.40 kJ/mol   
36
2,991.00 kJ/mol   
99+
5th Energy Level
5,306.70 kJ/mol   
31
Not Available   
Electrochemical Equivalent
Not Available   
1.72 g/amp-hr   
99+
Electron Work Function
Not Available   
Not Available   
Other Chemical Properties
NA   
Ionization, Radioactive Isotopes, Radioactivity   
Atomic Properties
Atomic Number
111   
7
91   
27
Electron Configuration
[Rn] 5f14 6d9 7s2   
[Rn] 5f2 6d1 7s2   
Crystal Structure
Body Centered Cubic (BCC)   
Tetragonal (TETR)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
TETR-Crystal-Structure-of-Protactinium.jpg#100   
Atom
  
  
Number of Protons
111   
7
91   
27
Number of Neutrons
161   
3
122   
21
Number of Electrons
111   
7
91   
27
Radius of an Atom
  
  
Atomic Radius
Not Available   
163.00 pm   
25
Covalent Radius
Not Available   
200.00 pm   
11
Van der Waals Radius
Not Available   
243.00 pm   
11
Atomic Weight
281.00 amu   
6
231.04 amu   
24
Atomic Volume
Not Available   
15.00 cm3/mol   
34
Adjacent Atomic Numbers
  
  
Previous Element
Darmstadtium
  
Thorium
  
Next Element
Copernicium
  
Uranium
  
Valence Electron Potential
Not Available   
92.00 (-eV)   
11
Lattice Constant
Not Available   
392.50 pm   
23
Lattice Angles
NA   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
28.70 g/cm3   
6
15.37 g/cm3   
20
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Elasticity properties
  
  
Poisson Ratio
Not Available   
Not Available   
Other Mechanical Properties
Unknown   
Unknown   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
Not Available   
15.37   
12
Magnetic Ordering
Unknown   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Unknown   
Conductor   
Resistivity
Not Available   
177.00 nΩ·m   
21
Electrical Conductivity
Not Available   
0.05 106/cm Ω   
34
Thermal Properties
Specific Heat
Not Available   
0.12 J/(kg K)   
40
Molar Heat Capacity
Not Available   
Not Available   
Thermal Conductivity
Not Available   
47.00 W/m·K   
32
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
Not Available   
9.90 µm/(m·K)   
40
Enthalpy
  
  
Enthalpy of Fusion
Not Available   
12.34 kJ/mol   
28
Standard Molar Entropy
Not Available   
198.10 J/mol.K   
1
Summary >>
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