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Californium vs Bohrium


Bohrium vs Californium


Periodic Table

Symbol
Cf   
Bh   

Group Number
Not Available   
7   
11

Period Number
7   
7   

Block
f block   
d block   

Element Family
Actinide   
Transition Metal   

CAS Number
7440713   
20
54037148   
12

Space Group Name
P63/mmc   
Not Available   

Space Group Number
194.00   
5
Not Available   

Facts

Interesting Facts
  • Californium metal is very harmful and highly radioactive.
  • Californium metal is the heaviest metal.
  
  • Bohrium metal is also known as Unnilseptium (Uns) and Nielsbohrium (Ns).
  

Sources
Made by Bombarding Curium with Helium Ions   
Found in Minerals, Mining, Synthetically Produced   

History
  
  

Who Discovered
Lawrence Berkeley National Laboratory   
Gesellschaft für Schwerionenforschung   

Discovery
In 1950   
In 1981   

Abundance
  
  

Uses

Uses & Benefits
  • 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.
  
  • Currently known uses of Bohrium metal are limited to research purpose only.
  

Industrial Uses
Chemical Industry   
NA   

Medical Uses
NA   
NA   

Other Uses
Alloys, Nuclear Research   
Research Purposes   

Biological Properties
  
  

Toxicity
Toxic   
Unknown   

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
900.00 °C   
99+
Not Available   

Boiling Point
1,470.00 °C   
99+
Not Available   

Appearance
  
  

Physical State
Solid   
Solid   

Color
Silver   
Unknown   

Luster
NA   
Unknown Luster   

Hardness
  
  

Mohs Hardness
3.00   
12
Not Available   

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
Cf   
Bh   

Isotopes
  
  

Known Isotopes
20   
19
5   
32

Electronegativity
  
  

Pauling Electronegativity
1.30   
32
Not Available   

Allred Rochow Electronegativity
1.20   
27
Not Available   

Electropositivity
  
  

Pauling Electropositivity
2.70   
22
Not Available   

Ionization Energies
  
  

1st Energy Level
608.00 kJ/mol   
99+
742.90 kJ/mol   
23

2nd Energy Level
1,206.00 kJ/mol   
99+
1,688.50 kJ/mol   
30

3rd Energy Level
2,267.00 kJ/mol   
99+
2,566.50 kJ/mol   
99+

4th Energy Level
3,599.00 kJ/mol   
99+
3,598.90 kJ/mol   
99+

5th Energy Level
Not Available   
4,727.80 kJ/mol   
37

6th Energy Level
Not Available   
5,991.70 kJ/mol   
24

7th Energy level
Not Available   
7,226.80 kJ/mol   
22

Electrochemical Equivalent
3.12 g/amp-hr   
15
Not Available   

Electron Work Function
Not Available   
Not Available   

Other Chemical Properties
Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Ionization, Radioactive Isotopes   

Atomic Properties

Atomic Number
98   
20
107   
11

Electron Configuration
[Rn] 5f10 7s2   
[Rn] 5f14 6d5 7s2   

Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Hexagonal Close Packed (HCP)   

Crystal Lattice
DHCP-Crystal-Structure-of-Californium.jpg#100   
BCC-Crystal-Structure-.jpg#100   

Atom
  
  

Number of Protons
98   
20
107   
11

Number of Neutrons
153   
9
155   
8

Number of Electrons
98   
20
107   
11

Radius of an Atom
  
  

Atomic Radius
186.00 pm   
9
128.00 pm   
99+

Covalent Radius
Not Available   
141.00 pm   
99+

Atomic Weight
251.00 amu   
17
270.00 amu   
8

Atomic Volume
Not Available   
Not Available   

Adjacent Atomic Numbers
  
  

Previous Element
Berkelium
  
Seaborgium
  

Next Element
Hassium
  

Valence Electron Potential
44.50 (-eV)   
38
Not Available   

Lattice Constant
338.00 pm   
99+
Not Available   

Lattice Angles
π/2, π/2, 2 π/3   
NA   

Lattice C/A Ratio
Not Available   
Not Available   

Mechanical Properties

Density
  
  

Density At Room Temperature
15.10 g/cm3   
21
37.10 g/cm3   
3

Tensile Strength
Not Available   
Not Available   

Viscosity
Not Available   
Not Available   

Vapor Pressure
  
  

Elasticity properties
  
  

Poisson Ratio
Not Available   
Not Available   

Other Mechanical Properties
Malleable, Sectile   
Unknown   

Magnetic Properties

Magnetic Characteristics
  
  

Specific Gravity
15.10   
13
Not Available   

Magnetic Ordering
Paramagnetic   
Unknown   

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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