Bohrium vs Samarium
Periodic Table
Symbol
Bh
Sm
Group Number
7
11
Not Available
Period Number
7
6
Block
d block
f block
Element Family
Transition Metal
Lanthanide
CAS Number
54037148
12
7440199
99+
Space Group Name
Not Available
R_ 3m
Space Group Number
Not Available
166.00
6
Facts
Interesting Facts
- Bohrium metal is also known as Unnilseptium (Uns) and Nielsbohrium (Ns).
- Samarium metals helps stimulating body metabolism.
- Samarium metals was 1st observed by Jean Charles Galissard de Marignac in Dydimia in 1853.
Sources
Found in Minerals, Mining, Synthetically Produced
Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Gesellschaft für Schwerionenforschung
Lecoq de Boisbaudran
Discovery
In 1981
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 Bohrium 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
Bh
Sm
Isotopes
Known Isotopes
5
32
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
742.90 kJ/mol
23
544.50 kJ/mol
99+
2nd Energy Level
1,688.50 kJ/mol
30
1,070.00 kJ/mol
99+
3rd Energy Level
2,566.50 kJ/mol
99+
2,260.00 kJ/mol
99+
4th Energy Level
3,598.90 kJ/mol
99+
3,990.00 kJ/mol
37
5th Energy Level
4,727.80 kJ/mol
37
Not Available
6th Energy Level
5,991.70 kJ/mol
24
Not Available
7th Energy level
7,226.80 kJ/mol
22
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
Ionization, Radioactive Isotopes
Atomic Properties
Atomic Number
107
11
62
99+
Electron Configuration
[Rn] 5f14 6d5 7s2
[Xe] 4f6 6s2
Crystal Structure
Hexagonal Close Packed (HCP)
Rhombohedral (RHO)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
RHO-Crystal-Structure-of-Samarium.jpg#100
Atom
Number of Protons
107
11
62
99+
Number of Neutrons
155
8
88
39
Number of Electrons
107
11
62
99+
Radius of an Atom
Atomic Radius
128.00 pm
99+
180.00 pm
14
Covalent Radius
141.00 pm
99+
198.00 pm
13
Van der Waals Radius
Not Available
229.00 pm
20
Atomic Weight
270.00 amu
8
150.36 amu
99+
Atomic Volume
Not Available
19.95 cm3/mol
19
Adjacent Atomic Numbers
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
37.10 g/cm3
3
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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