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Neptunium
Neptunium

Neptunium
Neptunium



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Neptunium
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Neptunium

Neptunium Neptunium Comparison

1 Periodic Table
1.1 Symbol
Np
Np
1.2 Group Number
NANA
Gadolinium Metal
0 17
1.3 Period Number
77
Lithium Metal
2 7
1.4 Block
f block
f block
1.5 Element Family
Actinide
Actinide
1.6 CAS Number
74399987439998
Aluminium Metal
7429905 54386242
2.3 Space Group Name
Pnma
Pnma
2.4 Space Group Number
62.0062.00
Plutonium Metal
11 229
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
In 1940
In 1940
3.4 Abundance
3.4.1 Abundance In Universe
NANA
Thallium Metal
5E-09 0.11
4.1.1 Abundance In Sun
~-9999 %~-9999 %
Beryllium Metal
1E-08 0.1
4.4.2 Abundance In Meteorites
NANA
Gold Metal
1.7E-07 22
4.4.4 Abundance In Earth's Crust
NANA
Radium Metal
9.9E-12 8.1
4.5.1 Abundance In Oceans
NANA
Protactinium Metal
2E-23 1.1
4.6.3 Abundance In Humans
NANA
Radium Metal
1E-13 1.4
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
NA
NA
6.2.3 Medical Uses
NA
NA
6.2.4 Other Uses
Alloys, Nuclear Research, Research Purposes
Alloys, Nuclear Research, Research Purposes
6.3 Biological Properties
6.3.1 Toxicity
Toxic
Toxic
6.3.2 Present in Human Body
6.3.3 In Blood
0.00 Blood/mg dm-30.00 Blood/mg dm-3
Plutonium Metal
0 1970
6.3.5 In Bone
0.00 p.p.m.0.00 p.p.m.
Plutonium Metal
0 170000
7 Physical
7.1 Melting Point
640.00 °C640.00 °C
Francium Metal
27 3410
7.3 Boiling Point
3,902.00 °C3,902.00 °C
Flerovium Metal
147 5660
7.5 Appearance
7.5.1 Physical State
Solid
Solid
7.5.2 Color
Silver
Silver
7.5.4 Luster
Metallic
Metallic
7.6 Hardness
7.6.1 Mohs Hardness
NANA
Cesium Metal
0.2 8.5
7.6.3 Brinell Hardness
NANA
Cesium Metal
0.14 3490
7.6.7 Vickers Hardness
NANA
Palladium Metal
121 3430
7.7 Speed of Sound
NANA
Thallium Metal
818 16200
7.8 Optical Properties
7.8.1 Refractive Index
NANA
Mercury Metal
1.000933 1.7229
7.8.3 Reflectivity
NANA
Molybdenum Metal
58 97
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
Np
Np
8.2 Isotopes
8.2.1 Known Isotopes
2020
Tennessine Metal
0 38
8.3 Electronegativity
8.3.1 Pauling Electronegativity
1.361.36
Francium Metal
0.7 2.54
8.3.3 Sanderson Electronegativity
NANA
Cesium Metal
0.22 2.56
8.3.6 Allred Rochow Electronegativity
1.221.22
Cesium Metal
0.86 1.82
8.3.8 Mulliken-Jaffe Electronegativity
NANA
Cesium Metal
0.62 2.48
8.3.10 Allen Electronegativity
NANA
Cesium Metal
0.659 2.7
8.4 Electropositivity
8.4.1 Pauling Electropositivity
2.642.64
Gold Metal
1.46 3.3
8.5 Ionization Energies
8.5.1 1st Energy Level
604.50 kJ/mol604.50 kJ/mol
Cesium Metal
375.7 26130
8.5.3 2nd Energy Level
1,128.00 kJ/mol1,128.00 kJ/mol
Ruthenium Metal
710.2162 28750
8.5.5 3rd Energy Level
1,997.00 kJ/mol1,997.00 kJ/mol
Osmium Metal
1600 34230
8.5.8 4th Energy Level
3,242.00 kJ/mol3,242.00 kJ/mol
Thorium Metal
2780 37066
8.5.10 5th Energy Level
NANA
Dubnium Metal
4305.2 97510
8.5.12 6th Energy Level
NANA
Seaborgium Metal
5715.8 105800
8.5.14 7th Energy level
NANA
Bohrium Metal
7226.8 114300
8.5.16 8th Energy Level
NANA
Hassium Metal
8857.4 125300
8.5.18 9th Energy Level
NANA
Yttrium Metal
14110 134700
8.6.1 10th Energy Level
NANA
Strontium Metal
17100 144300
8.7.1 11th Energy Level
NANA
Yttrium Metal
19900 169988
9.1.1 12th Energy Level
NANA
Molybdenum Metal
22219 189368
9.4.2 13th Energy Level
NANA
Molybdenum Metal
26930 76015
9.4.3 14th Energy Level
NANA
Molybdenum Metal
29196 86450
9.4.5 15th Energy Level
NANA
Manganese Metal
41987 97510
9.4.7 16th Energy Level
NANA
Iron Metal
47206 109480
9.4.8 17th Energy Level
NANA
Cobalt Metal
52737 122200
9.5.2 18th Energy Level
NANA
Nickel Metal
58570 134810
9.5.4 19th Energy Level
NANA
Copper Metal
64702 148700
9.5.6 20th Energy Level
NANA
Molybdenum Metal
80400 171200
9.6.1 21st Energy Level
NANA
Molybdenum Metal
87000 179100
9.6.2 22nd Energy Level
NANA
Molybdenum Metal
93400 184900
9.7.1 23rd Energy Level
NANA
Molybdenum Metal
98420 198800
9.7.2 24th Energy Level
NANA
Molybdenum Metal
104400 195200
9.9.1 25th Energy Level
NANA
Molybdenum Metal
121900 121900
9.9.2 26th Energy Level
NANA
Molybdenum Metal
127700 127700
9.10.1 27th Energy Level
NANA
Molybdenum Metal
133800 133800
9.12.1 28th Energy Level
NANA
Molybdenum Metal
139800 139800
10.1.2 29th Energy Level
NANA
Molybdenum Metal
148100 148100
10.1.3 30th Energy Level
NANA
Molybdenum Metal
154500 154500
10.2 Electrochemical Equivalent
1.77 g/amp-hr1.77 g/amp-hr
Beryllium Metal
0.16812 8.3209
10.3 Electron Work Function
NANA
Cesium Metal
2.14 5.65
10.5 Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Ionization, Radioactive Isotopes, Radioactivity, Solubility
11 Atomic
11.1 Atomic Number
9393
Lithium Metal
3 117
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
9393
Lithium Metal
3 117
11.6.3 Number of Neutrons
144144
Lithium Metal
4 184
11.7.2 Number of Electrons
9393
Lithium Metal
3 117
11.8 Radius of an Atom
11.8.1 Atomic Radius
155.00 pm155.00 pm
Beryllium Metal
112 265
11.8.3 Covalent Radius
190.00 pm190.00 pm
Beryllium Metal
96 260
11.8.4 Van der Waals Radius
221.00 pm221.00 pm
Zinc Metal
139 348
11.10 Atomic Weight
237.00 amu237.00 amu
Lithium Metal
6.94 294
12.2 Atomic Volume
11.62 cm3/mol11.62 cm3/mol
Manganese Metal
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)
Francium Metal
8 392.42
12.5 Lattice Constant
666.30 pm666.30 pm
Beryllium Metal
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
NANA
Beryllium Metal
1.567 1.886
13 Mechanical
13.1 Density
13.1.1 Density At Room Temperature
19.38 g/cm319.38 g/cm3
Lithium Metal
0.534 40.7
13.1.3 Density When Liquid (at m.p.)
NANA
Lithium Metal
0.512 20
14.2 Tensile Strength
125.00 MPa125.00 MPa
Indium Metal
2.5 11000
14.4 Viscosity
NANA
Mercury Metal
0.001526 0.001526
14.5 Vapor Pressure
14.5.1 Vapor Pressure at 1000 K
NANA
Cerium Metal
2.47E-11 121
14.6.1 Vapor Pressure at 2000 K
0.11 (Pa)0.11 (Pa)
Tungsten Metal
2.62E-10 774
14.8 Elasticity properties
14.8.1 Shear Modulus
NANA
Potassium Metal
1.3 222
14.9.1 Bulk Modulus
NANA
Cesium Metal
1.6 462
14.10.2 Young's Modulus
NANA
Cesium Metal
1.7 528
14.11 Poisson Ratio
NANA
Beryllium Metal
0.032 0.47
14.12 Other Mechanical Properties
Ductile
Ductile
15 Magnetic
15.1 Magnetic Characteristics
15.1.1 Specific Gravity
20.2520.25
Lithium Metal
0.53 4500
15.1.3 Magnetic Ordering
Paramagnetic
Paramagnetic
15.1.4 Permeability
NANA
Bismuth Metal
1.25643E-06 0.0063
15.2.1 Susceptibility
NANA
Bismuth Metal
-0.000166 200000
15.3 Electrical Properties
15.3.1 Electrical Property
Conductor
Conductor
15.3.2 Resistivity
1.22 nΩ·m1.22 nΩ·m
Thallium Metal
0.18 961
15.3.3 Electrical Conductivity
0.01 106/cm Ω0.01 106/cm Ω
Plutonium Metal
0.00666 0.63
15.3.4 Electron Affinity
NANA
Mercury Metal
0 222.8
16 Thermal
16.1 Specific Heat
0.12 J/(kg K)0.12 J/(kg K)
Americium Metal
0.11 3.6
16.2 Molar Heat Capacity
29.46 J/mol·K29.46 J/mol·K
Beryllium Metal
16.443 62.7
16.3 Thermal Conductivity
6.30 W/m·K6.30 W/m·K
Palladium
6.3 429
16.4 Critical Temperature
NANA
Ytterbium Metal
26.3 3223
16.5 Thermal Expansion
NANA
Tungsten Metal
4.5 97
16.6 Enthalpy
16.6.1 Enthalpy of Vaporization
NANA
Zinc Metal
7.32 799.1
16.6.2 Enthalpy of Fusion
3.20 kJ/mol3.20 kJ/mol
Cesium Metal
2.1 35.23
16.6.3 Enthalpy of Atomization
NANA
Mercury Metal
61.5 837
16.7 Standard Molar Entropy
NANA
Beryllium Metal
9.5 198.1