Symbol
Bh
  
Ca
  
Period Number
7
  
4
  
Block
d block
  
s block
  
Element Family
Transition Metal
  
Alkaline Earth
  
Space Group Name
Not Available
  
Fm_ 3m
  
Space Group Number
Not Available
  
Interesting Facts
- Bohrium metal is also known as Unnilseptium (Uns) and Nielsbohrium (Ns).
  
- Calcium ranks 5th rank in the list of earth’s abundance Percentage.
- It is found in the compound state.
- Gypsum or calcium sulfate is used as plaster and plaster of paris.
  
Sources
Found in Minerals, Mining, Synthetically Produced
  
Earth's crust, Found in Minerals, Mining, Ores of Minerals
  
History
  
  
Who Discovered
Gesellschaft für Schwerionenforschung
  
Humphry Davy
  
Discovery
In 1981
  
In 1808
  
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.
  
- It is used as a reducing agent while preparing metals like thorium and uranium. It is also used as an alloying agent for metals such as aluminum, copper & lead.
- Calcium carbonate or lime stone is used in cement.
  
Industrial Uses
NA
  
Chemical Industry
  
Medical Uses
NA
  
Dentistry, Pharmaceutical Industry
  
Other Uses
Research Purposes
  
Alloys
  
Biological Properties
  
  
Toxicity
Unknown
  
Non Toxic
  
Present in Human Body
No
  
Yes
  
In Blood
0.00 Blood/mg dm-3
  
37
60.50 Blood/mg dm-3
  
4
In Bone
0.00 p.p.m.
  
36
170,000.00 p.p.m.
  
1
Melting Point
Not Available
  
Boiling Point
Not Available
  
1,484.00 °C
  
99+
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Unknown
  
Gray
  
Luster
Unknown Luster
  
NA
  
Hardness
  
  
Mohs Hardness
Not Available
  
Brinell Hardness
Not Available
  
170.00 MPa
  
99+
Speed of Sound
Not Available
  
3,810.00 m/s
  
19
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
  
Ca
  
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
589.80 kJ/mol
  
99+
2nd Energy Level
1,688.50 kJ/mol
  
30
1,145.40 kJ/mol
  
99+
3rd Energy Level
2,566.50 kJ/mol
  
99+
4,912.40 kJ/mol
  
7
4th Energy Level
3,598.90 kJ/mol
  
99+
6,491.00 kJ/mol
  
7
5th Energy Level
4,727.80 kJ/mol
  
37
8,153.00 kJ/mol
  
7
6th Energy Level
5,991.70 kJ/mol
  
24
10,496.00 kJ/mol
  
8
7th Energy level
7,226.80 kJ/mol
  
22
12,270.00 kJ/mol
  
12
8th Energy Level
Not Available
  
14,206.00 kJ/mol
  
15
9th Energy Level
Not Available
  
18,191.00 kJ/mol
  
12
10th Energy Level
Not Available
  
20,385.00 kJ/mol
  
16
11th Energy Level
Not Available
  
57,110.00 kJ/mol
  
3
12th Energy Level
Not Available
  
63,410.00 kJ/mol
  
3
13th Energy Level
Not Available
  
70,110.00 kJ/mol
  
3
14th Energy Level
Not Available
  
78,890.00 kJ/mol
  
4
15th Energy Level
Not Available
  
86,310.00 kJ/mol
  
5
16th Energy Level
Not Available
  
94,000.00 kJ/mol
  
6
17th Energy Level
Not Available
  
104,900.00 kJ/mol
  
7
18th Energy Level
Not Available
  
111,711.00 kJ/mol
  
8
Electrochemical Equivalent
Not Available
  
0.75 g/amp-hr
  
99+
Electron Work Function
Not Available
  
Other Chemical Properties
Ionization, Radioactive Isotopes
  
Chemical Stability, Flammability, Ionization, Solubility
  
Electron Configuration
[Rn] 5f14 6d5 7s2
  
[Ar] 4s2
  
Crystal Structure
Hexagonal Close Packed (HCP)
  
Face Centered Cubic (FCC)
  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
  
FCC-Crystal-Structure-of-Calcium.jpg#100
  
Atom
  
  
Radius of an Atom
  
  
Van der Waals Radius
Not Available
  
Atomic Volume
Not Available
  
29.90 cm3/mol
  
7
Adjacent Atomic Numbers
  
  
Valence Electron Potential
Not Available
  
29.00 (-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
1.55 g/cm3
  
99+
Density When Liquid (at m.p.)
Not Available
  
1.38 g/cm3
  
99+
Tensile Strength
Not Available
  
Not Available
  
Viscosity
Not Available
  
Not Available
  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available
  
Elasticity properties
  
  
Shear Modulus
Not Available
  
Bulk Modulus
Not Available
  
Young's Modulus
Not Available
  
Poisson Ratio
Not Available
  
Other Mechanical Properties
Unknown
  
NA
  
Magnetic Characteristics
  
  
Specific Gravity
Not Available
  
Magnetic Ordering
Unknown
  
Diamagnetic
  
Electrical Properties
  
  
Electrical Property
Unknown
  
Conductor
  
Resistivity
Not Available
  
33.60 nΩ·m
  
99+
Electrical Conductivity
Not Available
  
0.30 10
6/cm Ω
  
6
Electron Affinity
Not Available
  
2.37 kJ/mol
  
39
Specific Heat
Not Available
  
0.63 J/(kg K)
  
7
Molar Heat Capacity
Not Available
  
25.93 J/mol·K
  
34
Thermal Conductivity
Not Available
  
201.00 W/m·K
  
5
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
Not Available
  
22.30 µm/(m·K)
  
19
Enthalpy
  
  
Enthalpy of Vaporization
Not Available
  
150.00 kJ/mol
  
99+
Enthalpy of Fusion
Not Available
  
8.54 kJ/mol
  
99+
Enthalpy of Atomization
Not Available
  
184.00 kJ/mol
  
99+
Standard Molar Entropy
Not Available
  
41.60 J/mol.K
  
36