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Neptunium vs Tungsten

Neptunium
Tungsten
Tungsten vs Neptunium


Periodic Table
Symbol
Np  
W  
Group Number
Not Available  
6  
12
Period Number
7  
6  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7439998  
99+
7440337  
99+
Space Group Name
Pnma  
Im_ 3m  
Space Group Number
62.00  
11
229.00  
1
Facts
Interesting Facts
Not Available  
  • Tungsten element has the second highest melting point.
  • Pure tungsten can easily cut down with the help of hacksaw.
  
Sources
Made by Bombarding Uranium with Neutrons, Ores of metals  
Earth's crust, Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Edwin McMillan and Philip H. Abelson  
Not Available  
Discovery
In 1940  
In 1781  
Abundance
  
  
Abundance In Universe
Not Available  
5 * 10-8 %  
27
Abundance In Sun
~-9999 %  
~0.0000004 %  
23
Abundance In Meteorites
Not Available  
0.00 %  
39
Abundance In Earth's Crust
Not Available  
0.00 %  
39
Abundance In Oceans
Not Available  
0.00 %  
18
Uses
Uses & Benefits
  • Currently known uses of Neptunium metal are limited to research purpose only.
  • Neptunium’s isotope neptunium-237 is used as a neutron detectors.
  
  • Tungsten and its alloys are used in high-temperature applications like welding electrodes, high-temperature furnace, etc.
  • Tungsten carbide is very hard and used in metal working, mining and petroleum industry.
  
Industrial Uses
NA  
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry  
Medical Uses
NA  
NA  
Other Uses
Alloys, Nuclear Research, Research Purposes  
Alloys  
Biological Properties
  
  
Toxicity
Toxic  
Non Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
37
0.00 Blood/mg dm-3  
31
In Bone
0.00 p.p.m.  
36
0.00 p.p.m.  
35
Physical Properties
Melting Point
640.00 °C  
99+
3,410.00 °C  
1
Boiling Point
3,902.00 °C  
13
5,660.00 °C  
1
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Grayish White  
Luster
Metallic  
Lustrous  
Hardness
  
  
Mohs Hardness
Not Available  
7.50  
2
Brinell Hardness
Not Available  
2,000.00 MPa  
4
Vickers Hardness
Not Available  
3,430.00 MPa  
1
Speed of Sound
Not Available  
4,620.00 m/s  
16
Optical Properties
  
  
Reflectivity
Not Available  
62.00 %  
13
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
Np  
W  
Isotopes
  
  
Known Isotopes
20  
19
33  
6
Electronegativity
  
  
Pauling Electronegativity
1.36  
29
2.36  
2
Sanderson Electronegativity
Not Available  
0.98  
23
Allred Rochow Electronegativity
1.22  
26
1.40  
19
Allen Electronegativity
Not Available  
1.47  
29
Electropositivity
  
  
Pauling Electropositivity
2.64  
25
1.64  
99+
Ionization Energies
  
  
1st Energy Level
604.50 kJ/mol  
99+
770.00 kJ/mol  
16
2nd Energy Level
1,128.00 kJ/mol  
99+
1,700.00 kJ/mol  
29
3rd Energy Level
1,997.00 kJ/mol  
99+
Not Available  
4th Energy Level
3,242.00 kJ/mol  
99+
Not Available  
Electrochemical Equivalent
1.77 g/amp-hr  
39
1.14 g/amp-hr  
99+
Electron Work Function
Not Available  
4.55 eV  
13
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Ionization, Radioactive Isotopes, Solubility  
Atomic Properties
Atomic Number
93  
25
74  
99+
Electron Configuration
[Rn] 5f4 6d1 7s2  
[Xe] 4f14 5d4 6s2  
Crystal Structure
Orthorhombic (ORTH)  
Body Centered Cubic (BCC)  
Crystal Lattice
ORTH-Crystal-Structure-of-Neptunium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
93  
25
74  
99+
Number of Neutrons
144  
14
110  
27
Number of Electrons
93  
25
74  
99+
Radius of an Atom
  
  
Atomic Radius
155.00 pm  
30
139.00 pm  
39
Covalent Radius
190.00 pm  
18
162.00 pm  
29
Van der Waals Radius
221.00 pm  
22
200.00 pm  
28
Atomic Weight
237.00 amu  
22
183.84 amu  
37
Atomic Volume
11.62 cm3/mol  
99+
9.53 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Uranium
  
Tantalum
  
Next Element
Plutonium
  
Rhenium
  
Valence Electron Potential
96.00 (-eV)  
9
140.00 (-eV)  
5
Lattice Constant
666.30 pm  
3
316.52 pm  
99+
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
19.38 g/cm3  
14
19.25 g/cm3  
16
Density When Liquid (at m.p.)
Not Available  
17.60 g/cm3  
5
Tensile Strength
125.00 MPa  
14
370.00 MPa  
10
Viscosity
Not Available  
Not Available  
Vapor Pressure
  
  
Vapor Pressure at 2000 K
0.11 (Pa)  
17
0.00 (Pa)  
32
Elasticity properties
  
  
Shear Modulus
Not Available  
161.00 GPa  
5
Bulk Modulus
Not Available  
310.00 GPa  
4
Young's Modulus
Not Available  
411.00 GPa  
4
Poisson Ratio
Not Available  
0.28  
17
Other Mechanical Properties
Ductile  
Ductile, Malleable  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
20.25  
6
19.22  
9
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Electrical Properties
  
  
Electrical Property
Conductor  
Superconductor  
Resistivity
1.22 nΩ·m  
99+
52.80 nΩ·m  
99+
Electrical Conductivity
0.01 106/cm Ω  
99+
0.19 106/cm Ω  
10
Electron Affinity
Not Available  
78.60 kJ/mol  
13
Thermal Properties
Specific Heat
0.12 J/(kg K)  
40
0.13 J/(kg K)  
39
Molar Heat Capacity
29.46 J/mol·K  
8
24.27 J/mol·K  
99+
Thermal Conductivity
6.30 W/m·K  
99+
173.00 W/m·K  
7
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
Not Available  
4.50 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
Not Available  
799.10 kJ/mol  
1
Enthalpy of Fusion
3.20 kJ/mol  
99+
35.23 kJ/mol  
1
Enthalpy of Atomization
Not Available  
837.00 kJ/mol  
1
Standard Molar Entropy
Not Available  
32.60 J/mol.K  
99+
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