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Roentgenium vs Californium

Roentgenium
Californium
Californium vs Roentgenium


Periodic Table
Symbol
Rg   
Cf   
Group Number
11   
7
Not Available   
Period Number
7   
7   
Block
d block   
f block   
Element Family
Unknown   
Actinide   
CAS Number
54386242   
1
7440713   
20
Space Group Name
Not Available   
P63/mmc   
Space Group Number
194.00   
5
194.00   
5
Facts
Interesting Facts
Not Available   
  • Californium metal is very harmful and highly radioactive.
  • Californium metal is the heaviest metal.
  
Sources
Synthetically Produced   
Made by Bombarding Curium with Helium Ions   
History
  
  
Who Discovered
Gesellschaft für Schwerionenforschung   
Lawrence Berkeley National Laboratory   
Discovery
In 1994   
In 1950   
Abundance
  
  
Uses
Uses & Benefits
  • Currently known uses of Roentgenium metal are limited to research purpose only.
  
  • Californium metal has a very strong neutron emitter. It is used as a metal detector.
  • It also used as an identifier to check Water and oil layers in oil wells.
  
Industrial Uses
NA   
Chemical Industry   
Medical Uses
NA   
NA   
Other Uses
Research Purposes   
Alloys, Nuclear Research   
Biological Properties
  
  
Toxicity
Unknown   
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   
900.00 °C   
99+
Boiling Point
Not Available   
1,470.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silver   
Silver   
Luster
Unknown Luster   
NA   
Hardness
  
  
Mohs Hardness
Not Available   
3.00   
12
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   
Cf   
Isotopes
  
  
Known Isotopes
1   
34
20   
19
Electronegativity
  
  
Pauling Electronegativity
Not Available   
1.30   
32
Allred Rochow Electronegativity
Not Available   
1.20   
27
Electropositivity
  
  
Pauling Electropositivity
Not Available   
2.70   
22
Ionization Energies
  
  
1st Energy Level
1,022.70 kJ/mol   
3
608.00 kJ/mol   
99+
2nd Energy Level
2,074.40 kJ/mol   
10
1,206.00 kJ/mol   
99+
3rd Energy Level
3,077.90 kJ/mol   
24
2,267.00 kJ/mol   
99+
4th Energy Level
4,052.40 kJ/mol   
36
3,599.00 kJ/mol   
99+
5th Energy Level
5,306.70 kJ/mol   
31
Not Available   
Electrochemical Equivalent
Not Available   
3.12 g/amp-hr   
15
Electron Work Function
Not Available   
Not Available   
Other Chemical Properties
NA   
Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Atomic Properties
Atomic Number
111   
7
98   
20
Electron Configuration
[Rn] 5f14 6d9 7s2   
[Rn] 5f10 7s2   
Crystal Structure
Body Centered Cubic (BCC)   
Double Hexagonal Close Packed (DHCP)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
DHCP-Crystal-Structure-of-Californium.jpg#100   
Atom
  
  
Number of Protons
111   
7
98   
20
Number of Neutrons
161   
3
153   
9
Number of Electrons
111   
7
98   
20
Radius of an Atom
  
  
Atomic Radius
Not Available   
186.00 pm   
9
Atomic Weight
281.00 amu   
6
251.00 amu   
17
Atomic Volume
Not Available   
Not Available   
Adjacent Atomic Numbers
  
  
Previous Element
Darmstadtium
  
Berkelium
  
Next Element
Copernicium
  
Einsteinium
  
Valence Electron Potential
Not Available   
44.50 (-eV)   
38
Lattice Constant
Not Available   
338.00 pm   
99+
Lattice Angles
NA   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
28.70 g/cm3   
6
15.10 g/cm3   
21
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   
Malleable, Sectile   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
Not Available   
15.10   
13
Magnetic Ordering
Unknown   
Paramagnetic   
Electrical Properties
  
  
Thermal Properties
Specific Heat
Not Available   
Not Available   
Molar Heat Capacity
Not Available   
Not Available   
Thermal Conductivity
Not Available   
Not Available   
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
Not Available   
Not Available   
Enthalpy
  
  
Standard Molar Entropy
Not Available   
Not Available   
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