Symbol
Bh
  
Na
  
Period Number
7
  
3
  
Block
d block
  
s block
  
Element Family
Transition Metal
  
Alkali
  
Space Group Name
Not Available
  
Im_ 3m
  
Space Group Number
Not Available
  
Interesting Facts
- Bohrium metal is also known as Unnilseptium (Uns) and Nielsbohrium (Ns).
  
- At room temperature Sodium metal is very soft as it can be chopped down into pieces with butter knife.
- The most common compound of Sodium is NaCl (Salt).
  
Sources
Found in Minerals, Mining, Synthetically Produced
  
By Electrolysis Process, Mining
  
History
  
  
Who Discovered
Gesellschaft für Schwerionenforschung
  
Humphry Davy
  
Discovery
In 1981
  
In 1807
  
Abundance
  
  
Abundance In Universe
Not Available
  
Abundance In Sun
~-9999 %
  
Abundance In Meteorites
Not Available
  
Abundance In Earth's Crust
Not Available
  
Abundance In Oceans
Not Available
  
Abundance In Humans
Not Available
  
Uses & Benefits
- Currently known uses of Bohrium metal are limited to research purpose only.
  
- In some nuclear reactors sodium is used as a heat exchanger.
- Compound of Sodium metals called Salt (Sodium chloride) is used in Food.
  
Industrial Uses
NA
  
Electrical Industry, Electronic Industry
  
Medical Uses
NA
  
Pharmaceutical Industry
  
Other Uses
Research Purposes
  
Alloys
  
Biological Properties
  
  
Toxicity
Unknown
  
Toxic
  
Present in Human Body
No
  
Yes
  
In Blood
0.00 Blood/mg dm-3
  
37
1,970.00 Blood/mg dm-3
  
1
In Bone
0.00 p.p.m.
  
36
10,000.00 p.p.m.
  
2
Melting Point
Not Available
  
Boiling Point
Not Available
  
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Unknown
  
Silvery White
  
Luster
Unknown Luster
  
Metallic
  
Hardness
  
  
Mohs Hardness
Not Available
  
Brinell Hardness
Not Available
  
Speed of Sound
Not Available
  
3,200.00 m/s
  
24
Optical Properties
  
  
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Bh
  
Na
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Not Available
  
Sanderson Electronegativity
Not Available
  
Allred Rochow Electronegativity
Not Available
  
Mulliken-Jaffe Electronegativity
Not Available
  
Allen Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Not Available
  
Ionization Energies
  
  
1st Energy Level
742.90 kJ/mol
  
23
495.80 kJ/mol
  
99+
2nd Energy Level
1,688.50 kJ/mol
  
30
4,562.00 kJ/mol
  
4
3rd Energy Level
2,566.50 kJ/mol
  
99+
6,910.30 kJ/mol
  
6
4th Energy Level
3,598.90 kJ/mol
  
99+
9,543.00 kJ/mol
  
5
5th Energy Level
4,727.80 kJ/mol
  
37
13,354.00 kJ/mol
  
4
6th Energy Level
5,991.70 kJ/mol
  
24
16,613.00 kJ/mol
  
4
7th Energy level
7,226.80 kJ/mol
  
22
20,117.00 kJ/mol
  
4
8th Energy Level
Not Available
  
25,496.00 kJ/mol
  
4
9th Energy Level
Not Available
  
28,932.00 kJ/mol
  
4
10th Energy Level
Not Available
  
141,362.00 kJ/mol
  
2
11th Energy Level
Not Available
  
159,076.00 kJ/mol
  
2
Electrochemical Equivalent
Not Available
  
0.86 g/amp-hr
  
99+
Electron Work Function
Not Available
  
Other Chemical Properties
Ionization, Radioactive Isotopes
  
Chemical Stability, Corrosion, Flammability, Ionization, Solubility
  
Electron Configuration
[Rn] 5f14 6d5 7s2
  
[Ne] 3s1
  
Crystal Structure
Hexagonal Close Packed (HCP)
  
Body Centered Cubic (BCC)
  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
  
BCC-Crystal-Structure-.jpg#100
  
Atom
  
  
Radius of an Atom
  
  
Van der Waals Radius
Not Available
  
Atomic Volume
Not Available
  
23.70 cm3/mol
  
10
Adjacent Atomic Numbers
  
  
Valence Electron Potential
Not Available
  
14.10 (-eV)
  
99+
Lattice Constant
Not Available
  
Lattice Angles
NA
  
π/2, π/2, π/2
  
Lattice C/A Ratio
Not Available
  
Not Available
  
Density
  
  
Density At Room Temperature
0.97 g/cm3
  
99+
Density When Liquid (at m.p.)
Not Available
  
0.93 g/cm3
  
99+
Tensile Strength
Not Available
  
Not Available
  
Viscosity
Not Available
  
Not Available
  
Vapor Pressure
  
  
Elasticity properties
  
  
Shear Modulus
Not Available
  
Bulk Modulus
Not Available
  
Young's Modulus
Not Available
  
Poisson Ratio
Not Available
  
Not Available
  
Other Mechanical Properties
Unknown
  
NA
  
Magnetic Characteristics
  
  
Specific Gravity
Not Available
  
Magnetic Ordering
Unknown
  
Paramagnetic
  
Electrical Properties
  
  
Electrical Property
Unknown
  
Conductor
  
Resistivity
Not Available
  
47.70 nΩ·m
  
99+
Electrical Conductivity
Not Available
  
0.21 10
6/cm Ω
  
9
Electron Affinity
Not Available
  
52.80 kJ/mol
  
19
Specific Heat
Not Available
  
1.23 J/(kg K)
  
3
Molar Heat Capacity
Not Available
  
28.23 J/mol·K
  
10
Thermal Conductivity
Not Available
  
142.00 W/m·K
  
11
Critical Temperature
Not Available
  
Thermal Expansion
Not Available
  
71.00 µm/(m·K)
  
4
Enthalpy
  
  
Enthalpy of Vaporization
Not Available
  
89.04 kJ/mol
  
99+
Enthalpy of Fusion
Not Available
  
2.59 kJ/mol
  
99+
Enthalpy of Atomization
Not Available
  
108.40 kJ/mol
  
99+
Standard Molar Entropy
Not Available
  
51.30 J/mol.K
  
28