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Uranium vs Neptunium

Uranium
Neptunium
Neptunium vs Uranium


Periodic Table
Symbol
U  
Np  
Group Number
0  
18
3  
15
Period Number
7  
7  
Block
f block  
f block  
Element Family
Actinide  
Actinide  
CAS Number
7440611  
28
7439998  
99+
Space Group Name
Cmcm  
Pnma  
Space Group Number
63.00  
13
62.00  
14
Facts
Interesting Facts
  • Major mining countries of Uranium include Russia, Australia, Namibia, Canada and Niger and total 33% Uranium are mine in Kazakhstan.
  
Neptunium was the first transuranium element to be discovered.  
Sources
Earth's crust, Mining, Ores of Minerals  
Made by Bombarding Uranium with Neutrons, Ores of metals  
History
  
  
Who Discovered
-  
Edwin McMillan and Philip H. Abelson  
Discovery
In 1789  
In 1940  
Abundance
  
  
Abundance In Universe
0.00 %  
30
0.00 %  
40
Abundance In Sun
0.00 %  
26
0.00 %  
26
Abundance In Meteorites
0.00 %  
99+
0.00 %  
99+
Abundance In Earth's Crust
0.00 %  
36
0.00 %  
99+
Abundance In Oceans
0.00 %  
11
-  
Abundance In Humans
0.00 %  
24
0.00 %  
24
Uses
Uses & Benefits
  • The main use of this metal include nuclear fuel which is used to generate electricity yin nuclear power stations.
  • Synthetic elements like transuranium are made from Uranium metal.
  
  • 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
Ammunition Industry, Chemical Industry  
-  
Medical Uses
-  
-  
Other Uses
Alloys, Jewellery, Nuclear Reactor's Fuel, Sculptures, Statues  
Alloys, Nuclear Research, Research Purposes  
Biological Properties
  
  
Toxicity
Toxic  
Toxic  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
37
0.00 Blood/mg dm-3  
40
In Bone
1.20 p.p.m.  
19
0.00 p.p.m.  
99+
Physical
Melting Point
1,132.00 °C  
39
640.00 °C  
99+
Boiling Point
3,818.00 °C  
16
3,902.00 °C  
13
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery Gray  
Silver  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
6.00  
6
6.00  
6
Brinell Hardness
2,350.00 MPa  
2
622.00 MPa  
23
Vickers Hardness
1,960.00 MPa  
6
640.00 MPa  
23
Speed of Sound
3,155.00 m/s  
36
2,260.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.38  
40
1.30  
99+
Reflectivity
80.00 %  
7
64.00 %  
19
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
U  
Np  
Isotopes
  
  
Known Isotopes
25  
14
20  
19
Electronegativity
  
  
Pauling Electronegativity
1.38  
29
1.36  
30
Sanderson Electronegativity
1.38  
22
1.36  
23
Allred Rochow Electronegativity
1.22  
27
1.22  
27
Mulliken-Jaffe Electronegativity
1.38  
29
1.36  
31
Allen Electronegativity
1.38  
36
1.36  
37
Electropositivity
  
  
Pauling Electropositivity
2.62  
26
2.64  
25
Ionization Energies
  
  
1st Energy Level
597.60 kJ/mol  
99+
604.50 kJ/mol  
99+
2nd Energy Level
1,420.00 kJ/mol  
99+
1,128.00 kJ/mol  
99+
3rd Energy Level
1,900.00 kJ/mol  
99+
1,997.00 kJ/mol  
99+
4th Energy Level
3,145.00 kJ/mol  
99+
3,242.00 kJ/mol  
99+
5th Energy Level
5,976.00 kJ/mol  
99+
6,180.00 kJ/mol  
99+
6th Energy Level
5,976.00 kJ/mol  
99+
5,785.00 kJ/mol  
99+
7th Energy level
5,970.00 kJ/mol  
99+
6,040.00 kJ/mol  
99+
8th Energy Level
5,976.00 kJ/mol  
99+
6,040.00 kJ/mol  
99+
9th Energy Level
5,976.00 kJ/mol  
99+
6,180.00 kJ/mol  
99+
10th Energy Level
5,976.00 kJ/mol  
99+
6,180.00 kJ/mol  
99+
11th Energy Level
5,976.00 kJ/mol  
99+
6,180.00 kJ/mol  
99+
12th Energy Level
5,970.00 kJ/mol  
99+
61,800.00 kJ/mol  
13
13th Energy Level
5,970.00 kJ/mol  
99+
6,180.00 kJ/mol  
40
14th Energy Level
5,970.00 kJ/mol  
34
6,180.00 kJ/mol  
29
15th Energy Level
59,700.00 kJ/mol  
99+
60,600.00 kJ/mol  
99+
16th Energy Level
59,700.00 kJ/mol  
35
60,420.00 kJ/mol  
31
17th Energy Level
597.60 kJ/mol  
99+
604.00 kJ/mol  
99+
18th Energy Level
5,976.00 kJ/mol  
99+
6,040.00 kJ/mol  
99+
19th Energy Level
597.60 kJ/mol  
99+
604.50 kJ/mol  
99+
20th Energy Level
597.00 kJ/mol  
99+
604.00 kJ/mol  
99+
21st Energy Level
597.60 kJ/mol  
99+
6,040.00 kJ/mol  
17
22nd Energy Level
597.00 kJ/mol  
99+
604.00 kJ/mol  
40
23rd Energy Level
597.60 kJ/mol  
99+
6,040.00 kJ/mol  
18
24th Energy Level
597.60 kJ/mol  
99+
604.50 kJ/mol  
99+
25th Energy Level
597.60 kJ/mol  
99+
604.00 kJ/mol  
99+
26th Energy Level
597.60 kJ/mol  
99+
604.00 kJ/mol  
99+
27th Energy Level
597.60 kJ/mol  
99+
604.00 kJ/mol  
99+
28th Energy Level
597.60 kJ/mol  
99+
604.00 kJ/mol  
99+
29th Energy Level
597.60 kJ/mol  
99+
604.00 kJ/mol  
99+
30th Energy Level
597.60 kJ/mol  
99+
604.00 kJ/mol  
99+
Electrochemical Equivalent
1.48 g/amp-hr  
99+
1.77 g/amp-hr  
99+
Electron Work Function
3.63 eV  
99+
4.90 eV  
12
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Atomic
Atomic Number
92  
26
93  
25
Electron Configuration
[Rn] 5f3 6d1 7s2  
[Rn] 5f4 6d1 7s2  
Crystal Structure
Orthorhombic (ORTH)  
Orthorhombic (ORTH)  
Crystal Lattice
ORTH-Crystal-Structure-of-Uranium.jpg#100  
ORTH-Crystal-Structure-of-Neptunium.jpg#100  
Atom
  
  
Number of Protons
92  
26
93  
25
Number of Neutrons
146  
14
144  
15
Number of Electrons
92  
26
93  
25
Radius of an Atom
  
  
Atomic Radius
156.00 pm  
31
155.00 pm  
32
Covalent Radius
196.00 pm  
14
190.00 pm  
18
Van der Waals Radius
186.00 pm  
40
221.00 pm  
27
Atomic Weight
238.03 amu  
21
237.00 amu  
22
Atomic Volume
12.59 cm3/mol  
99+
11.62 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Protactinium
  
Uranium
  
Next Element
Neptunium
  
Plutonium
  
Valence Electron Potential
170.00 (-eV)  
4
96.00 (-eV)  
9
Lattice Constant
295.08 pm  
99+
666.30 pm  
3
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.02  
99+
1.43  
99+
Mechanical
Density
  
  
Density At Room Temperature
19.10 g/cm3  
17
19.38 g/cm3  
14
Density When Liquid (at m.p.)
17.30 g/cm3  
17
20.25 g/cm3  
10
Tensile Strength
100.00 MPa  
28
125.00 MPa  
26
Viscosity
0.00  
21
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
22
Vapor Pressure at 2000 K
0.01 (Pa)  
20
0.11 (Pa)  
17
Elasticity properties
  
  
Shear Modulus
111.00 GPa  
10
5.60 GPa  
99+
Bulk Modulus
100.00 GPa  
16
180.00 GPa  
9
Young's Modulus
208.00 GPa  
11
46.00 GPa  
99+
Poisson Ratio
0.23  
30
0.26  
22
Other Mechanical Properties
Ductile, Malleable  
Ductile  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
18.80  
19
20.25  
15
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
16
0.00 H/m  
6
Susceptibility
0.00  
24
0.00  
24
Electrical Properties
  
  
Electrical Property
Poor Conductor  
Conductor  
Resistivity
0.28 nΩ·m  
99+
1.22 nΩ·m  
99+
Electrical Conductivity
0.04 106/cm Ω  
99+
0.01 106/cm Ω  
99+
Electron Affinity
50.60 kJ/mol  
25
118.60 kJ/mol  
6
Thermal
Specific Heat
0.12 J/(kg K)  
99+
0.12 J/(kg K)  
99+
Molar Heat Capacity
27.67 J/mol·K  
18
29.46 J/mol·K  
10
Thermal Conductivity
27.50 W/m·K  
99+
6.30 W/m·K  
99+
Critical Temperature
1,405.00 K  
99+
913.00 K  
99+
Thermal Expansion
13.90 µm/(m·K)  
30
13.30 µm/(m·K)  
35
Enthalpy
  
  
Enthalpy of Vaporization
477.00 kJ/mol  
18
336.00 kJ/mol  
39
Enthalpy of Fusion
15.48 kJ/mol  
19
3.20 kJ/mol  
99+
Enthalpy of Atomization
489.50 kJ/mol  
18
275.30 kJ/mol  
99+
Standard Molar Entropy
50.20 J/mol.K  
99+
64.00 J/mol.K  
21
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