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Tungsten Neptunium Comparison

Tungsten
Neptunium
Neptunium Tungsten comparison


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