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Roentgenium vs 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
Berkelium
  

Next Element

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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