Berkelium vs Tantalum
Periodic Table
Symbol
Bk
Ta
Group Number
Not Available
5
13
Period Number
7
6
Block
f block
d block
Element Family
Actinide
Transition Metal
CAS Number
7440406
99+
7440257
99+
Space Group Name
P63/mmc
Im_ 3m
Space Group Number
194.00
5
229.00
1
Facts
Interesting Facts
- X-ray Diffraction- different compounds of Berkelium metals are identified using it.
- Commercial uses of Berkelium metal are not yet discovered.
- Tantalum metal is known as corrosion resistance.
- Tantalum metal can easily fabricated and It is a good conductor of heat and electricity.
Sources
Bombarding Americium with Alpha Particles.
Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Lawrence Berkeley National Laboratory
Anders Gustaf Ekeberg
Discovery
In 1949
In 1802
Abundance
Abundance In Universe
Not Available
8 * 10-9 %
31
Abundance In Meteorites
Not Available
0.00 %
99+
Abundance In Earth's Crust
Not Available
0.00 %
37
Abundance In Oceans
Not Available
0.00 %
31
Uses
Uses & Benefits
- This metal is very rare and has no commercial uses.
- 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.
Industrial Uses
NA
Electrical Industry, Electronic Industry
Medical Uses
NA
NA
Other Uses
NA
Alloys
Biological Properties
Toxicity
Unknown
Low Toxic
Present in Human Body
No
Yes
In Blood
0.00 Blood/mg dm-3
37
Not Available
In Bone
0.00 p.p.m.
36
0.03 p.p.m.
28
Physical Properties
Melting Point
986.00 °C
99+
2,996.00 °C
4
Boiling Point
2,627.00 °C
40
5,425.00 °C
4
Appearance
Physical State
Solid
Solid
Color
Silver
Gray Blue
Luster
Metallic
Metallic
Hardness
Mohs Hardness
Not Available
6.50
5
Brinell Hardness
Not Available
440.00 MPa
28
Vickers Hardness
Not Available
870.00 MPa
12
Speed of Sound
Not Available
3,400.00 m/s
22
Optical Properties
Reflectivity
Not Available
78.00 %
6
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
Bk
Ta
Isotopes
Known Isotopes
14
25
31
8
Electronegativity
Pauling Electronegativity
1.30
32
1.50
27
Allred Rochow Electronegativity
1.20
27
1.33
22
Allen Electronegativity
2.70
1
1.34
33
Electropositivity
Pauling Electropositivity
2.70
22
2.50
27
Ionization Energies
1st Energy Level
601.00 kJ/mol
99+
761.00 kJ/mol
18
2nd Energy Level
1,186.00 kJ/mol
99+
1,500.00 kJ/mol
40
3rd Energy Level
2,152.00 kJ/mol
99+
Not Available
4th Energy Level
3,434.00 kJ/mol
99+
Not Available
Electrochemical Equivalent
3.07 g/amp-hr
16
1.35 g/amp-hr
99+
Electron Work Function
Not Available
4.25 eV
21
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility
Atomic Properties
Atomic Number
97
21
73
99+
Electron Configuration
[Rn] 5f9 7s2
[Xe] 4f14 5d3 6s2
Crystal Structure
Double Hexagonal Close Packed (DHCP)
Body Centered Cubic (BCC)
Crystal Lattice
DHCP-Crystal-Structure-of-Berkelium.jpg#100
BCC-Crystal-Structure-.jpg#100
Atom
Number of Protons
97
21
73
99+
Number of Neutrons
150
11
108
28
Number of Electrons
97
21
73
99+
Radius of an Atom
Atomic Radius
170.00 pm
22
146.00 pm
35
Covalent Radius
Not Available
170.00 pm
25
Van der Waals Radius
Not Available
200.00 pm
28
Atomic Weight
247.00 amu
18
180.95 amu
38
Atomic Volume
Not Available
10.90 cm3/mol
99+
Adjacent Atomic Numbers
Valence Electron Potential
45.50 (-eV)
36
110.00 (-eV)
7
Lattice Constant
341.60 pm
99+
330.13 pm
99+
Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, π/2
Lattice C/A Ratio
Not Available
Not Available
Mechanical Properties
Density
Density At Room Temperature
14.78 g/cm3
22
16.69 g/cm3
18
Density When Liquid (at m.p.)
13.25 g/cm3
11
15.00 g/cm3
9
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 2000 K
Not Available
0.00 (Pa)
31
Elasticity properties
Shear Modulus
Not Available
69.00 GPa
13
Bulk Modulus
Not Available
200.00 GPa
8
Young's Modulus
Not Available
186.00 GPa
13
Poisson Ratio
Not Available
0.34
10
Other Mechanical Properties
NA
Ductile
Magnetic Properties
Magnetic Characteristics
Specific Gravity
14.00
14
16.65
11
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Conductor
Conductor
Resistivity
Not Available
131.00 nΩ·m
25
Electrical Conductivity
Not Available
0.08 106/cm Ω
27
Electron Affinity
Not Available
31.00 kJ/mol
29
Thermal Properties
Specific Heat
Not Available
0.14 J/(kg K)
37
Molar Heat Capacity
Not Available
25.36 J/mol·K
99+
Thermal Conductivity
10.00 W/m·K
99+
57.50 W/m·K
27
Critical Temperature
Not Available
Not Available
Thermal Expansion
Not Available
6.30 µm/(m·K)
99+
Enthalpy
Enthalpy of Vaporization
Not Available
753.10 kJ/mol
2
Enthalpy of Fusion
Not Available
31.40 kJ/mol
3
Enthalpy of Atomization
Not Available
782.00 kJ/mol
3
Standard Molar Entropy
Not Available
41.50 J/mol.K
37
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