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Tungsten Neptunium Comparison

Tungsten
Neptunium
Neptunium Tungsten comparison


Periodic Table
Symbol
W  
Np  
Group Number
6  
12
3  
15
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  
2
62.00  
14
Facts
Interesting Facts
  • Tungsten element has the second highest melting point.
  • Pure tungsten can easily cut down with the help of hacksaw.
  
Neptunium was the first transuranium element to be discovered.  
Sources
Earth's crust, Found in Minerals, Mining, Ores of Minerals  
Made by Bombarding Uranium with Neutrons, Ores of metals  
History
  
  
Who Discovered
-  
Edwin McMillan and Philip H. Abelson  
Discovery
In 1781  
In 1940  
Abundance
  
  
Abundance In Universe
0.00 %  
28
0.00 %  
40
Abundance In Sun
0.00 %  
23
0.00 %  
26
Abundance In Meteorites
0.00 %  
39
0.00 %  
99+
Abundance In Earth's Crust
0.00 %  
39
0.00 %  
99+
Abundance In Oceans
0.00 %  
18
-  
Abundance In Humans
0.00 %  
24
0.00 %  
24
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  
-  
Medical Uses
-  
-  
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  
40
In Bone
0.00 p.p.m.  
40
0.00 p.p.m.  
99+
Physical
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
6.00  
6
Brinell Hardness
2,000.00 MPa  
4
622.00 MPa  
23
Vickers Hardness
3,430.00 MPa  
3
640.00 MPa  
23
Speed of Sound
4,620.00 m/s  
20
2,260.00 m/s  
99+
Optical Properties
  
  
Refractive Index
2.10  
11
1.30  
99+
Reflectivity
62.00 %  
21
64.00 %  
19
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
W  
Np  
Isotopes
  
  
Known Isotopes
33  
6
20  
19
Electronegativity
  
  
Pauling Electronegativity
2.36  
3
1.36  
30
Sanderson Electronegativity
0.98  
99+
1.36  
23
Allred Rochow Electronegativity
1.40  
20
1.22  
27
Mulliken-Jaffe Electronegativity
2.36  
3
1.36  
31
Allen Electronegativity
1.47  
33
1.36  
37
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  
30
1,128.00 kJ/mol  
99+
3rd Energy Level
2,045.40 kJ/mol  
99+
1,997.00 kJ/mol  
99+
4th Energy Level
7,700.00 kJ/mol  
8
3,242.00 kJ/mol  
99+
5th Energy Level
7,700.00 kJ/mol  
17
6,180.00 kJ/mol  
99+
6th Energy Level
7,700.00 kJ/mol  
35
5,785.00 kJ/mol  
99+
7th Energy level
7,700.00 kJ/mol  
29
6,040.00 kJ/mol  
99+
8th Energy Level
7,700.00 kJ/mol  
29
6,040.00 kJ/mol  
99+
9th Energy Level
7,700.00 kJ/mol  
25
6,180.00 kJ/mol  
99+
10th Energy Level
7,700.00 kJ/mol  
29
6,180.00 kJ/mol  
99+
11th Energy Level
7,700.00 kJ/mol  
28
6,180.00 kJ/mol  
99+
12th Energy Level
7,700.00 kJ/mol  
99+
61,800.00 kJ/mol  
13
13th Energy Level
7,700.00 kJ/mol  
21
6,180.00 kJ/mol  
40
14th Energy Level
770.00 kJ/mol  
99+
6,180.00 kJ/mol  
29
15th Energy Level
77,000.00 kJ/mol  
18
60,600.00 kJ/mol  
99+
16th Energy Level
77,000.00 kJ/mol  
13
60,420.00 kJ/mol  
31
17th Energy Level
770.00 kJ/mol  
34
604.00 kJ/mol  
99+
18th Energy Level
7,700.00 kJ/mol  
24
6,040.00 kJ/mol  
99+
19th Energy Level
770.00 kJ/mol  
31
604.50 kJ/mol  
99+
20th Energy Level
770.00 kJ/mol  
25
604.00 kJ/mol  
99+
21st Energy Level
770.00 kJ/mol  
99+
6,040.00 kJ/mol  
17
22nd Energy Level
770.00 kJ/mol  
19
604.00 kJ/mol  
40
23rd Energy Level
770.00 kJ/mol  
99+
6,040.00 kJ/mol  
18
24th Energy Level
770.00 kJ/mol  
15
604.50 kJ/mol  
99+
25th Energy Level
770.00 kJ/mol  
14
604.00 kJ/mol  
99+
26th Energy Level
770.00 kJ/mol  
14
604.00 kJ/mol  
99+
27th Energy Level
770.00 kJ/mol  
13
604.00 kJ/mol  
99+
28th Energy Level
770.00 kJ/mol  
19
604.00 kJ/mol  
99+
29th Energy Level
770.00 kJ/mol  
19
604.00 kJ/mol  
99+
30th Energy Level
770.00 kJ/mol  
14
604.00 kJ/mol  
99+
Electrochemical Equivalent
1.14 g/amp-hr  
99+
1.77 g/amp-hr  
99+
Electron Work Function
4.55 eV  
18
4.90 eV  
12
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility  
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Atomic
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  
28
144  
15
Number of Electrons
74  
99+
93  
25
Radius of an Atom
  
  
Atomic Radius
139.00 pm  
99+
155.00 pm  
32
Covalent Radius
162.00 pm  
31
190.00 pm  
18
Van der Waals Radius
200.00 pm  
35
221.00 pm  
27
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
1.29  
99+
1.43  
99+
Mechanical
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  
15
20.25 g/cm3  
10
Tensile Strength
370.00 MPa  
11
125.00 MPa  
26
Viscosity
0.00  
1
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
22
Vapor Pressure at 2000 K
0.00 (Pa)  
99+
0.11 (Pa)  
17
Elasticity properties
  
  
Shear Modulus
161.00 GPa  
5
5.60 GPa  
99+
Bulk Modulus
310.00 GPa  
4
180.00 GPa  
9
Young's Modulus
411.00 GPa  
4
46.00 GPa  
99+
Poisson Ratio
0.28  
17
0.26  
22
Other Mechanical Properties
Ductile, Malleable  
Ductile  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
19.22  
18
20.25  
15
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
6
Susceptibility
0.00  
23
0.00  
24
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  
15
118.60 kJ/mol  
6
Thermal
Specific Heat
0.13 J/(kg K)  
40
0.12 J/(kg K)  
99+
Molar Heat Capacity
24.27 J/mol·K  
99+
29.46 J/mol·K  
10
Thermal Conductivity
173.00 W/m·K  
7
6.30 W/m·K  
99+
Critical Temperature
3,695.00 K  
1
913.00 K  
99+
Thermal Expansion
4.50 µm/(m·K)  
99+
13.30 µm/(m·K)  
35
Enthalpy
  
  
Enthalpy of Vaporization
799.10 kJ/mol  
1
336.00 kJ/mol  
39
Enthalpy of Fusion
35.23 kJ/mol  
1
3.20 kJ/mol  
99+
Enthalpy of Atomization
837.00 kJ/mol  
1
275.30 kJ/mol  
99+
Standard Molar Entropy
32.60 J/mol.K  
99+
64.00 J/mol.K  
21
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