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Dubnium Curium Comparison


Curium Dubnium comparison


Periodic Table

Symbol
Db   
Cm   

Group Number
5   
13
Not Available   

Period Number
7   
7   

Block
d block   
f block   

Element Family
Transition Metal   
Actinide   

CAS Number
53850354   
14
7440519   
36

Space Group Name
Not Available   
Not Available   

Space Group Number
Not Available   
Not Available   

Facts

Interesting Facts
  • IUPAC allotted a temporary name to Dubnium metal as “ Unnilpentium”.
  • In the production of Dubnium, thermal gradient chromatography is used.
  
  • Curium metal does not occur free in nature.
  • Curium metal is a synthetically produced metal.
  

Sources
Produced by Bombarding Am243 with Ne22, Synthetically Produced   
Bombarding Plutonium with Helium Ions   

History
  
  

Who Discovered
Joint Institute for Nuclear Research   
Glenn T. Seaborg, Ralph A. James, Albert Ghiorso   

Discovery
In 1968   
In 1944   

Abundance
  
  

Uses

Uses & Benefits
  • Currently known uses of Dubnium metal are limited to research purpose only.
  
  • Curium metal is used to provide power to electrical equipment for space missions.
  

Industrial Uses
NA   
NA   

Medical Uses
NA   
NA   

Other Uses
Research Purposes   
Research Purposes   

Biological Properties
  
  

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   
1,340.00 °C   
34

Boiling Point
Not Available   
3,110.00 °C   
30

Appearance
  
  

Physical State
Solid   
Solid   

Color
Unknown   
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
Db   
Cm   

Isotopes
  
  

Known Isotopes
10   
28
15   
24

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
664.80 kJ/mol   
38
581.00 kJ/mol   
99+

2nd Energy Level
1,546.70 kJ/mol   
38
1,196.00 kJ/mol   
99+

3rd Energy Level
2,378.40 kJ/mol   
99+
2,026.00 kJ/mol   
99+

4th Energy Level
3,298.80 kJ/mol   
99+
3,550.00 kJ/mol   
99+

5th Energy Level
4,305.20 kJ/mol   
39
Not Available   

Electrochemical Equivalent
Not Available   
3.07 g/amp-hr   
16

Electron Work Function
Not Available   
Not Available   

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

Atomic Properties

Atomic Number
105   
13
96   
22

Electron Configuration
[Rn] 5f14 6d3 7s2   
[Rn] 5f7 6d1 7s2   

Crystal Structure
Body Centered Cubic (BCC)   
Double Hexagonal Close Packed (DHCP)   

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

Atom
  
  

Number of Protons
105   
13
96   
22

Number of Neutrons
157   
7
151   
10

Number of Electrons
105   
13
96   
22

Radius of an Atom
  
  

Atomic Radius
139.00 pm   
39
174.00 pm   
20

Covalent Radius
149.00 pm   
35
169.00 pm   
26

Van der Waals Radius
Not Available   
200.00 pm   
28

Atomic Weight
268.00 amu   
10
247.00 amu   
18

Atomic Volume
Not Available   
18.28 cm3/mol   
26

Adjacent Atomic Numbers
  
  

Previous Element
Americium
  

Next Element
Seaborgium
  
Berkelium
  

Valence Electron Potential
Not Available   
44.50 (-eV)   
38

Lattice Constant
Not Available   
Not Available   

Lattice Angles
NA   
NA   

Lattice C/A Ratio
Not Available   
Not Available   

Mechanical Properties

Density
  
  

Density At Room Temperature
29.30 g/cm3   
5
13.51 g/cm3   
25

Density When Liquid (at m.p.)
Not Available   
13.85 g/cm3   
10

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   
13.51   
17

Magnetic Ordering
Unknown   
Antiferromagnetic   

Electrical Properties
  
  

Resistivity
Not Available   
1.25 nΩ·m   
99+

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
  
  

Enthalpy of Fusion
Not Available   
15.00 kJ/mol   
21

Standard Molar Entropy
Not Available   
Not Available   

Summary >>
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