Tantalum vs Bohrium
Periodic Table
Symbol
Ta
Bh
Group Number
5
13
7
11
Period Number
6
7
Block
d block
d block
Element Family
Transition Metal
Transition Metal
CAS Number
7440257
99+
54037148
12
Space Group Name
Im_ 3m
Not Available
Space Group Number
229.00
1
Not Available
Facts
Interesting Facts
- Tantalum metal is known as corrosion resistance.
- Tantalum metal can easily fabricated and It is a good conductor of heat and electricity.
- Bohrium metal is also known as Unnilseptium (Uns) and Nielsbohrium (Ns).
Sources
Found in Minerals, Mining, Ores of Minerals
Found in Minerals, Mining, Synthetically Produced
History
Who Discovered
Anders Gustaf Ekeberg
Gesellschaft für Schwerionenforschung
Discovery
In 1802
In 1981
Abundance
Abundance In Universe
8 * 10-9 %
31
Not Available
Abundance In Meteorites
0.00 %
99+
Not Available
Abundance In Earth's Crust
0.00 %
37
Not Available
Abundance In Oceans
0.00 %
31
Not Available
Uses
Uses & Benefits
- Tantalum metal is mainly used in the manufacturing of electron components. Its Oxide layer acts as an insulator.
- Tantalum metal is also used in surgical transplant like replacement of bone, skull plates and as a woven gauze.
- Currently known uses of Bohrium metal are limited to research purpose only.
Industrial Uses
Electrical Industry, Electronic Industry
NA
Medical Uses
NA
NA
Other Uses
Alloys
Research Purposes
Biological Properties
Toxicity
Low Toxic
Unknown
Present in Human Body
Yes
No
In Blood
Not Available
0.00 Blood/mg dm-3
37
In Bone
0.03 p.p.m.
28
0.00 p.p.m.
36
Physical Properties
Melting Point
2,996.00 °C
4
Not Available
Boiling Point
5,425.00 °C
4
Not Available
Appearance
Physical State
Solid
Solid
Color
Gray Blue
Unknown
Luster
Metallic
Unknown Luster
Hardness
Mohs Hardness
6.50
5
Not Available
Brinell Hardness
440.00 MPa
28
Not Available
Vickers Hardness
870.00 MPa
12
Not Available
Speed of Sound
3,400.00 m/s
22
Not Available
Optical Properties
Reflectivity
78.00 %
6
Not Available
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
Ta
Bh
Isotopes
Known Isotopes
31
8
5
32
Electronegativity
Pauling Electronegativity
1.50
27
Not Available
Allred Rochow Electronegativity
1.33
22
Not Available
Allen Electronegativity
1.34
33
Not Available
Electropositivity
Pauling Electropositivity
2.50
27
Not Available
Ionization Energies
1st Energy Level
761.00 kJ/mol
18
742.90 kJ/mol
23
2nd Energy Level
1,500.00 kJ/mol
40
1,688.50 kJ/mol
30
3rd Energy Level
Not Available
2,566.50 kJ/mol
99+
4th Energy Level
Not Available
3,598.90 kJ/mol
99+
5th Energy Level
Not Available
4,727.80 kJ/mol
37
6th Energy Level
Not Available
5,991.70 kJ/mol
24
7th Energy level
Not Available
7,226.80 kJ/mol
22
Electrochemical Equivalent
1.35 g/amp-hr
99+
Not Available
Electron Work Function
4.25 eV
21
Not Available
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility
Ionization, Radioactive Isotopes
Atomic Properties
Atomic Number
73
99+
107
11
Electron Configuration
[Xe] 4f14 5d3 6s2
[Rn] 5f14 6d5 7s2
Crystal Structure
Body Centered Cubic (BCC)
Hexagonal Close Packed (HCP)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
BCC-Crystal-Structure-.jpg#100
Atom
Number of Protons
73
99+
107
11
Number of Neutrons
108
28
155
8
Number of Electrons
73
99+
107
11
Radius of an Atom
Atomic Radius
146.00 pm
35
128.00 pm
99+
Covalent Radius
170.00 pm
25
141.00 pm
99+
Van der Waals Radius
200.00 pm
28
Not Available
Atomic Weight
180.95 amu
38
270.00 amu
8
Atomic Volume
10.90 cm3/mol
99+
Not Available
Adjacent Atomic Numbers
Valence Electron Potential
110.00 (-eV)
7
Not Available
Lattice Constant
330.13 pm
99+
Not Available
Lattice Angles
π/2, π/2, π/2
NA
Lattice C/A Ratio
Not Available
Not Available
Mechanical Properties
Density
Density At Room Temperature
16.69 g/cm3
18
37.10 g/cm3
3
Density When Liquid (at m.p.)
15.00 g/cm3
9
Not Available
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 2000 K
0.00 (Pa)
31
Not Available
Elasticity properties
Shear Modulus
69.00 GPa
13
Not Available
Bulk Modulus
200.00 GPa
8
Not Available
Young's Modulus
186.00 GPa
13
Not Available
Poisson Ratio
0.34
10
Not Available
Other Mechanical Properties
Ductile
Unknown
Magnetic Properties
Magnetic Characteristics
Specific Gravity
16.65
11
Not Available
Magnetic Ordering
Paramagnetic
Unknown
Electrical Properties
Electrical Property
Conductor
Unknown
Resistivity
131.00 nΩ·m
25
Not Available
Electrical Conductivity
0.08 106/cm Ω
27
Not Available
Electron Affinity
31.00 kJ/mol
29
Not Available
Thermal Properties
Specific Heat
0.14 J/(kg K)
37
Not Available
Molar Heat Capacity
25.36 J/mol·K
99+
Not Available
Thermal Conductivity
57.50 W/m·K
27
Not Available
Critical Temperature
Not Available
Not Available
Thermal Expansion
6.30 µm/(m·K)
99+
Not Available
Enthalpy
Enthalpy of Vaporization
753.10 kJ/mol
2
Not Available
Enthalpy of Fusion
31.40 kJ/mol
3
Not Available
Enthalpy of Atomization
782.00 kJ/mol
3
Not Available
Standard Molar Entropy
41.50 J/mol.K
37
Not Available
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