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Dubnium vs Samarium

Dubnium
Samarium
Samarium vs Dubnium


Periodic Table
Symbol
Db   
Sm   
Group Number
5   
13
Not Available   
Period Number
7   
6   
Block
d block   
f block   
Element Family
Transition Metal   
Lanthanide   
CAS Number
53850354   
14
7440199   
99+
Space Group Name
Not Available   
R_ 3m   
Space Group Number
Not Available   
166.00   
6
Facts
Interesting Facts
  • IUPAC allotted a temporary name to Dubnium metal as “ Unnilpentium”.
  • In the production of Dubnium, thermal gradient chromatography is used.
  
  • Samarium metals helps stimulating body metabolism.
  • Samarium metals was 1st observed by Jean Charles Galissard de Marignac in Dydimia in 1853.
  
Sources
Produced by Bombarding Am243 with Ne22, Synthetically Produced   
Found in Minerals, Mining, Ores of Minerals   
History
  
  
Who Discovered
Joint Institute for Nuclear Research   
Lecoq de Boisbaudran   
Discovery
In 1968   
In 1879   
Abundance
  
  
Abundance In Universe
Not Available   
5 * 10-7 %   
19
Abundance In Sun
~-9999 %   
~0.0000001 %   
26
Abundance In Meteorites
Not Available   
0.00 %   
37
Abundance In Earth's Crust
Not Available   
0.00 %   
29
Abundance In Oceans
Not Available   
0.00 %   
40
Uses
Uses & Benefits
  • Currently known uses of Dubnium metal are limited to research purpose only.
  
  • Magnets of Samarium cobalt alloy are stronger than that of Iron and hence, they are used in microwave application.
  • Samarium metal also used in optical lasers and infrared absorbing glasses and as a neutron absorber.
  
Industrial Uses
NA   
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry   
Medical Uses
NA   
NA   
Other Uses
Research Purposes   
Alloys, In Nuclear Reactors   
Biological Properties
  
  
Toxicity
Unknown   
Slightly Toxic   
Present in Human Body
No   
Yes   
In Blood
0.00 Blood/mg dm-3   
37
0.01 Blood/mg dm-3   
22
In Bone
0.00 p.p.m.   
36
Not Available   
Physical Properties
Melting Point
Not Available   
1,072.00 °C   
99+
Boiling Point
Not Available   
1,900.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Unknown   
Silvery White   
Luster
Unknown Luster   
Lustrous   
Hardness
  
  
Brinell Hardness
Not Available   
441.00 MPa   
27
Vickers Hardness
Not Available   
412.00 MPa   
24
Speed of Sound
Not Available   
2,130.00 m/s   
99+
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   
Sm   
Isotopes
  
  
Known Isotopes
10   
28
30   
9
Electronegativity
  
  
Pauling Electronegativity
Not Available   
1.17   
40
Allred Rochow Electronegativity
Not Available   
1.07   
32
Electropositivity
  
  
Pauling Electropositivity
Not Available   
2.83   
14
Ionization Energies
  
  
1st Energy Level
664.80 kJ/mol   
38
544.50 kJ/mol   
99+
2nd Energy Level
1,546.70 kJ/mol   
38
1,070.00 kJ/mol   
99+
3rd Energy Level
2,378.40 kJ/mol   
99+
2,260.00 kJ/mol   
99+
4th Energy Level
3,298.80 kJ/mol   
99+
3,990.00 kJ/mol   
37
5th Energy Level
4,305.20 kJ/mol   
39
Not Available   
Electrochemical Equivalent
Not Available   
1.87 g/amp-hr   
34
Electron Work Function
Not Available   
2.70 eV   
99+
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Ionization, Radioactive Isotopes   
Atomic Properties
Atomic Number
105   
13
62   
99+
Electron Configuration
[Rn] 5f14 6d3 7s2   
[Xe] 4f6 6s2   
Crystal Structure
Body Centered Cubic (BCC)   
Rhombohedral (RHO)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
RHO-Crystal-Structure-of-Samarium.jpg#100   
Atom
  
  
Number of Protons
105   
13
62   
99+
Number of Neutrons
157   
7
88   
39
Number of Electrons
105   
13
62   
99+
Radius of an Atom
  
  
Atomic Radius
139.00 pm   
39
180.00 pm   
14
Covalent Radius
149.00 pm   
35
198.00 pm   
13
Van der Waals Radius
Not Available   
229.00 pm   
20
Atomic Weight
268.00 amu   
10
150.36 amu   
99+
Atomic Volume
Not Available   
19.95 cm3/mol   
19
Adjacent Atomic Numbers
  
  
Previous Element
Rutherfordium
  
Promethium
  
Next Element
Seaborgium
  
Europium
  
Valence Electron Potential
Not Available   
44.80 (-eV)   
37
Lattice Constant
Not Available   
362.10 pm   
33
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
29.30 g/cm3   
5
7.52 g/cm3   
99+
Density When Liquid (at m.p.)
Not Available   
7.16 g/cm3   
32
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available   
0.94 (Pa)   
9
Elasticity properties
  
  
Shear Modulus
Not Available   
19.50 GPa   
34
Bulk Modulus
Not Available   
37.80 GPa   
35
Young's Modulus
Not Available   
49.70 GPa   
37
Poisson Ratio
Not Available   
0.27   
19
Other Mechanical Properties
Unknown   
NA   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
Not Available   
7.52   
99+
Magnetic Ordering
Unknown   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Unknown   
Conductor   
Resistivity
Not Available   
0.94 nΩ·m   
99+
Electrical Conductivity
Not Available   
0.01 106/cm Ω   
99+
Electron Affinity
Not Available   
50.00 kJ/mol   
21
Thermal Properties
Specific Heat
Not Available   
0.20 J/(kg K)   
31
Molar Heat Capacity
Not Available   
29.54 J/mol·K   
7
Thermal Conductivity
Not Available   
13.30 W/m·K   
99+
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
Not Available   
12.70 µm/(m·K)   
30
Enthalpy
  
  
Enthalpy of Vaporization
Not Available   
166.40 kJ/mol   
99+
Enthalpy of Fusion
Not Available   
8.62 kJ/mol   
40
Enthalpy of Atomization
Not Available   
209.00 kJ/mol   
99+
Standard Molar Entropy
Not Available   
69.60 J/mol.K   
15
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