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Tantalum vs Neptunium

Tantalum
Neptunium
Neptunium vs Tantalum


Periodic Table
Symbol
Ta   
Np   
Group Number
5   
13
Not Available   
Period Number
6   
7   
Block
d block   
f block   
Element Family
Transition Metal   
Actinide   
CAS Number
7440257   
99+
7439998   
99+
Space Group Name
Im_ 3m   
Pnma   
Space Group Number
229.00   
1
62.00   
11
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.
  
Not Available   
Sources
Found in Minerals, Mining, Ores of Minerals   
Made by Bombarding Uranium with Neutrons, Ores of metals   
History
  
  
Who Discovered
Anders Gustaf Ekeberg   
Edwin McMillan and Philip H. Abelson   
Discovery
In 1802   
In 1940   
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 Neptunium metal are limited to research purpose only.
  • Neptunium’s isotope neptunium-237 is used as a neutron detectors.
  
Industrial Uses
Electrical Industry, Electronic Industry   
NA   
Medical Uses
NA   
NA   
Other Uses
Alloys   
Alloys, Nuclear Research, Research Purposes   
Biological Properties
  
  
Toxicity
Low Toxic   
Toxic   
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
640.00 °C   
99+
Boiling Point
5,425.00 °C   
4
3,902.00 °C   
13
Appearance
  
  
Physical State
Solid   
Solid   
Color
Gray Blue   
Silver   
Luster
Metallic   
Metallic   
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   
Np   
Isotopes
  
  
Known Isotopes
31   
8
20   
19
Electronegativity
  
  
Pauling Electronegativity
1.50   
27
1.36   
29
Allred Rochow Electronegativity
1.33   
22
1.22   
26
Allen Electronegativity
1.34   
33
Not Available   
Electropositivity
  
  
Pauling Electropositivity
2.50   
27
2.64   
25
Ionization Energies
  
  
1st Energy Level
761.00 kJ/mol   
18
604.50 kJ/mol   
99+
2nd Energy Level
1,500.00 kJ/mol   
40
1,128.00 kJ/mol   
99+
3rd Energy Level
Not Available   
1,997.00 kJ/mol   
99+
4th Energy Level
Not Available   
3,242.00 kJ/mol   
99+
Electrochemical Equivalent
1.35 g/amp-hr   
99+
1.77 g/amp-hr   
39
Electron Work Function
4.25 eV   
21
Not Available   
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Atomic Properties
Atomic Number
73   
99+
93   
25
Electron Configuration
[Xe] 4f14 5d3 6s2   
[Rn] 5f4 6d1 7s2   
Crystal Structure
Body Centered Cubic (BCC)   
Orthorhombic (ORTH)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
ORTH-Crystal-Structure-of-Neptunium.jpg#100   
Atom
  
  
Number of Protons
73   
99+
93   
25
Number of Neutrons
108   
28
144   
14
Number of Electrons
73   
99+
93   
25
Radius of an Atom
  
  
Atomic Radius
146.00 pm   
35
155.00 pm   
30
Covalent Radius
170.00 pm   
25
190.00 pm   
18
Van der Waals Radius
200.00 pm   
28
221.00 pm   
22
Atomic Weight
180.95 amu   
38
237.00 amu   
22
Atomic Volume
10.90 cm3/mol   
99+
11.62 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Hafnium
  
Uranium
  
Next Element
Tungsten
  
Plutonium
  
Valence Electron Potential
110.00 (-eV)   
7
96.00 (-eV)   
9
Lattice Constant
330.13 pm   
99+
666.30 pm   
3
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
16.69 g/cm3   
18
19.38 g/cm3   
14
Density When Liquid (at m.p.)
15.00 g/cm3   
9
Not Available   
Tensile Strength
Not Available   
125.00 MPa   
14
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 2000 K
0.00 (Pa)   
31
0.11 (Pa)   
17
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   
Ductile   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
16.65   
11
20.25   
6
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Conductor   
Resistivity
131.00 nΩ·m   
25
1.22 nΩ·m   
99+
Electrical Conductivity
0.08 106/cm Ω   
27
0.01 106/cm Ω   
99+
Electron Affinity
31.00 kJ/mol   
29
Not Available   
Thermal Properties
Specific Heat
0.14 J/(kg K)   
37
0.12 J/(kg K)   
40
Molar Heat Capacity
25.36 J/mol·K   
99+
29.46 J/mol·K   
8
Thermal Conductivity
57.50 W/m·K   
27
6.30 W/m·K   
99+
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
3.20 kJ/mol   
99+
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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