1 Periodic Table
1.1 Symbol
1.2 Group Number
1.3 Period Number
1.4 Block
1.5 Element Family
1.6 CAS Number
74399987439998
7429905
54386242
2.3 Space Group Name
2.4 Space Group Number
3 Facts
3.1 Interesting Facts
Not Available
Not Available
3.2 Sources
Made by Bombarding Uranium with Neutrons, Ores of metals
Made by Bombarding Uranium with Neutrons, Ores of metals
3.3 History
3.3.1 Who Discovered
Edwin McMillan and Philip H. Abelson
Edwin McMillan and Philip H. Abelson
3.3.2 Discovery
3.4 Abundance
3.4.1 Abundance In Universe
4.1.1 Abundance In Sun
~-9999 %~-9999 %
1E-08
0.1
4.4.2 Abundance In Meteorites
4.4.4 Abundance In Earth's Crust
4.5.1 Abundance In Oceans
4.6.3 Abundance In Humans
6 Uses
6.2 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.
- Currently known uses of Neptunium metal are limited to research purpose only.
-
Neptunium’s isotope neptunium-237 is used as a neutron detectors.
6.2.2 Industrial Uses
6.2.3 Medical Uses
6.2.4 Other Uses
Alloys, Nuclear Research, Research Purposes
Alloys, Nuclear Research, Research Purposes
6.3 Biological Properties
6.3.1 Toxicity
6.3.2 Present in Human Body
6.3.3 In Blood
0.00 Blood/mg dm-30.00 Blood/mg dm-3
0
1970
6.3.5 In Bone
0.00 p.p.m.0.00 p.p.m.
0
170000
7 Physical
7.1 Melting Point
640.00 °C640.00 °C
27
3410
7.3 Boiling Point
3,902.00 °C3,902.00 °C
147
5660
7.5 Appearance
7.5.1 Physical State
7.5.2 Color
7.5.4 Luster
7.6 Hardness
7.6.1 Mohs Hardness
7.6.3 Brinell Hardness
7.6.7 Vickers Hardness
7.7 Speed of Sound
7.8 Optical Properties
7.8.1 Refractive Index
7.8.3 Reflectivity
7.9 Allotropes
7.9.1 α Allotropes
Not Available
Not Available
7.9.2 β Allotropes
Not Available
Not Available
7.9.3 γ Allotropes
Not Available
Not Available
8 Chemical
8.1 Chemical Formula
8.2 Isotopes
8.2.1 Known Isotopes
8.3 Electronegativity
8.3.1 Pauling Electronegativity
8.3.3 Sanderson Electronegativity
8.3.6 Allred Rochow Electronegativity
8.3.8 Mulliken-Jaffe Electronegativity
8.3.10 Allen Electronegativity
8.4 Electropositivity
8.4.1 Pauling Electropositivity
8.5 Ionization Energies
8.5.1 1st Energy Level
604.50 kJ/mol604.50 kJ/mol
375.7
26130
8.5.3 2nd Energy Level
1,128.00 kJ/mol1,128.00 kJ/mol
710.2162
28750
8.5.5 3rd Energy Level
1,997.00 kJ/mol1,997.00 kJ/mol
1600
34230
8.5.8 4th Energy Level
3,242.00 kJ/mol3,242.00 kJ/mol
2780
37066
8.5.10 5th Energy Level
8.5.12 6th Energy Level
8.5.14 7th Energy level
8.5.16 8th Energy Level
8.5.18 9th Energy Level
8.6.1 10th Energy Level
8.7.1 11th Energy Level
9.1.1 12th Energy Level
9.4.2 13th Energy Level
9.4.3 14th Energy Level
9.4.5 15th Energy Level
9.4.7 16th Energy Level
9.4.8 17th Energy Level
9.5.2 18th Energy Level
9.5.4 19th Energy Level
9.5.6 20th Energy Level
9.6.1 21st Energy Level
9.6.2 22nd Energy Level
9.7.1 23rd Energy Level
9.7.2 24th Energy Level
9.9.1 25th Energy Level
9.9.2 26th Energy Level
9.10.1 27th Energy Level
9.12.1 28th Energy Level
10.1.2 29th Energy Level
10.1.3 30th Energy Level
10.2 Electrochemical Equivalent
1.77 g/amp-hr1.77 g/amp-hr
0.16812
8.3209
10.3 Electron Work Function
10.5 Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Ionization, Radioactive Isotopes, Radioactivity, Solubility
11 Atomic
11.1 Atomic Number
11.4 Electron Configuration
[Rn] 5f4 6d1 7s2
[Rn] 5f4 6d1 7s2
11.5 Crystal Structure
Orthorhombic (ORTH)
Orthorhombic (ORTH)
11.5.1 Crystal Lattice
11.6 Atom
11.6.1 Number of Protons
11.6.3 Number of Neutrons
11.7.2 Number of Electrons
11.8 Radius of an Atom
11.8.1 Atomic Radius
155.00 pm155.00 pm
112
265
11.8.3 Covalent Radius
190.00 pm190.00 pm
96
260
11.8.4 Van der Waals Radius
221.00 pm221.00 pm
139
348
11.10 Atomic Weight
237.00 amu237.00 amu
6.94
294
12.2 Atomic Volume
11.62 cm3/mol11.62 cm3/mol
1.39
71.07
12.3 Adjacent Atomic Numbers
12.3.1 Previous Element
12.3.2 Next Element
12.4 Valence Electron Potential
96.00 (-eV)96.00 (-eV)
8
392.42
12.5 Lattice Constant
666.30 pm666.30 pm
228.58
891.25
12.7 Lattice Angles
π/2, π/2, π/2
π/2, π/2, π/2
12.8 Lattice C/A Ratio
13 Mechanical
13.1 Density
13.1.1 Density At Room Temperature
19.38 g/cm319.38 g/cm3
0.534
40.7
13.1.3 Density When Liquid (at m.p.)
14.2 Tensile Strength
125.00 MPa125.00 MPa
2.5
11000
14.4 Viscosity
14.5 Vapor Pressure
14.5.1 Vapor Pressure at 1000 K
14.6.1 Vapor Pressure at 2000 K
0.11 (Pa)0.11 (Pa)
2.62E-10
774
14.8 Elasticity properties
14.8.1 Shear Modulus
14.9.1 Bulk Modulus
14.10.2 Young's Modulus
14.11 Poisson Ratio
14.12 Other Mechanical Properties
15 Magnetic
15.1 Magnetic Characteristics
15.1.1 Specific Gravity
15.1.3 Magnetic Ordering
Paramagnetic
Paramagnetic
15.1.4 Permeability
15.2.1 Susceptibility
15.3 Electrical Properties
15.3.1 Electrical Property
15.3.2 Resistivity
1.22 nΩ·m1.22 nΩ·m
0.18
961
15.3.3 Electrical Conductivity
0.01 106/cm Ω0.01 106/cm Ω
0.00666
0.63
15.3.4 Electron Affinity
16 Thermal
16.1 Specific Heat
0.12 J/(kg K)0.12 J/(kg K)
0.11
3.6
16.2 Molar Heat Capacity
29.46 J/mol·K29.46 J/mol·K
16.443
62.7
16.3 Thermal Conductivity
6.30 W/m·K6.30 W/m·K
6.3
429
16.4 Critical Temperature
16.5 Thermal Expansion
16.6 Enthalpy
16.6.1 Enthalpy of Vaporization
16.6.2 Enthalpy of Fusion
3.20 kJ/mol3.20 kJ/mol
2.1
35.23
16.6.3 Enthalpy of Atomization
16.7 Standard Molar Entropy