1 Periodic Table
1.1 Symbol
1.2 Group Number
1.3 Period Number
1.5 Block
1.6 Element Family
1.7 CAS Number
74399987440348
7429905
54386242
1.11 Space Group Name
1.12 Space Group Number
2 Facts
2.1 Interesting Facts
Not Available
Not Available
2.2 Sources
Made by Bombarding Uranium with Neutrons, Ores of metals
Obtained by Treating Radium with Neutrons, Ores of metals
2.3 History
2.3.1 Who Discovered
Edwin McMillan and Philip H. Abelson
Friedrich Oskar Giesel
2.3.2 Discovery
2.4 Abundance
2.4.1 Abundance In Universe
3.4.2 Abundance In Sun
~-9999 %~-9999 %
1E-08
0.1
3.4.4 Abundance In Meteorites
3.4.6 Abundance In Earth's Crust
3.4.8 Abundance In Oceans
3.4.9 Abundance In Humans
4 Uses
4.1 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.
- Actinium metal has a great source of alpha rays but it is hardly used outside research purpose.
4.1.1 Industrial Uses
4.1.2 Medical Uses
4.1.3 Other Uses
Alloys, Nuclear Research, Research Purposes
Alloys, Nuclear Research, Research Purposes
4.2 Biological Properties
4.2.1 Toxicity
4.2.2 Present in Human Body
4.2.3 In Blood
0.00 Blood/mg dm-30.00 Blood/mg dm-3
0
1970
4.2.5 In Bone
0.00 p.p.m.0.00 p.p.m.
0
170000
6 Physical
6.1 Melting Point
640.00 °C1,227.00 °C
27
3410
6.2 Boiling Point
3,902.00 °C3,200.00 °C
147
5660
7.2 Appearance
7.2.1 Physical State
7.2.2 Color
7.2.3 Luster
7.3 Hardness
7.3.1 Mohs Hardness
7.6.2 Brinell Hardness
7.6.5 Vickers Hardness
7.8 Speed of Sound
8.3 Optical Properties
8.3.1 Refractive Index
8.4.2 Reflectivity
8.5 Allotropes
8.5.1 α Allotropes
Not Available
Not Available
8.5.2 β Allotropes
Not Available
Not Available
8.5.3 γ Allotropes
Not Available
Not Available
9 Chemical
9.1 Chemical Formula
9.2 Isotopes
9.2.1 Known Isotopes
9.3 Electronegativity
9.3.1 Pauling Electronegativity
9.5.2 Sanderson Electronegativity
9.5.6 Allred Rochow Electronegativity
9.5.8 Mulliken-Jaffe Electronegativity
9.5.12 Allen Electronegativity
9.6 Electropositivity
9.6.1 Pauling Electropositivity
9.7 Ionization Energies
9.7.1 1st Energy Level
604.50 kJ/mol499.00 kJ/mol
375.7
26130
9.7.3 2nd Energy Level
1,128.00 kJ/mol1,170.00 kJ/mol
710.2162
28750
9.7.6 3rd Energy Level
1,997.00 kJ/mol1,900.00 kJ/mol
1600
34230
9.7.9 4th Energy Level
3,242.00 kJ/mol4,700.00 kJ/mol
2780
37066
9.7.12 5th Energy Level
9.7.16 6th Energy Level
9.7.18 7th Energy level
9.7.20 8th Energy Level
9.7.22 9th Energy Level
9.7.25 10th Energy Level
9.7.27 11th Energy Level
9.7.30 12th Energy Level
9.8.1 13th Energy Level
9.9.1 14th Energy Level
10.1.1 15th Energy Level
10.1.2 16th Energy Level
10.4.2 17th Energy Level
10.4.4 18th Energy Level
10.4.6 19th Energy Level
10.4.7 20th Energy Level
10.5.2 21st Energy Level
10.5.4 22nd Energy Level
10.5.5 23rd Energy Level
10.5.7 24th Energy Level
10.6.1 25th Energy Level
10.6.2 26th Energy Level
10.7.1 27th Energy Level
10.7.2 28th Energy Level
10.9.1 29th Energy Level
10.10.1 30th Energy Level
10.11 Electrochemical Equivalent
1.77 g/amp-hr2.82 g/amp-hr
0.16812
8.3209
11.2 Electron Work Function
11.3 Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Ionization, Radioactive Isotopes, Radioactivity, Solubility
12 Atomic
12.1 Atomic Number
12.3 Electron Configuration
[Rn] 5f4 6d1 7s2
[Rn] 6d1 7s2
12.4 Crystal Structure
Orthorhombic (ORTH)
Face Centered Cubic (FCC)
12.4.1 Crystal Lattice
12.5 Atom
12.5.1 Number of Protons
12.7.2 Number of Neutrons
12.7.4 Number of Electrons
12.9 Radius of an Atom
12.9.1 Atomic Radius
155.00 pm195.00 pm
112
265
12.9.3 Covalent Radius
12.9.5 Van der Waals Radius
12.10 Atomic Weight
237.00 amu227.00 amu
6.94
294
13.2 Atomic Volume
11.62 cm3/mol22.54 cm3/mol
1.39
71.07
13.3 Adjacent Atomic Numbers
13.3.1 Previous Element
13.3.2 Next Element
13.4 Valence Electron Potential
96.00 (-eV)38.60 (-eV)
8
392.42
13.5 Lattice Constant
666.30 pm567.00 pm
228.58
891.25
13.7 Lattice Angles
π/2, π/2, π/2
π/2, π/2, π/2
13.8 Lattice C/A Ratio
14 Mechanical
14.1 Density
14.1.1 Density At Room Temperature
19.38 g/cm310.00 g/cm3
0.534
40.7
14.1.3 Density When Liquid (at m.p.)
15.2 Tensile Strength
15.4 Viscosity
15.6 Vapor Pressure
15.6.1 Vapor Pressure at 1000 K
15.7.1 Vapor Pressure at 2000 K
15.9 Elasticity properties
15.9.1 Shear Modulus
15.10.2 Bulk Modulus
15.10.4 Young's Modulus
15.11 Poisson Ratio
15.13 Other Mechanical Properties
16 Magnetic
16.1 Magnetic Characteristics
16.1.1 Specific Gravity
16.1.2 Magnetic Ordering
Paramagnetic
Paramagnetic
16.1.3 Permeability
16.1.4 Susceptibility
16.2 Electrical Properties
16.2.1 Electrical Property
16.2.2 Resistivity
16.2.3 Electrical Conductivity
0.01 106/cm ΩNA
0.00666
0.63
16.2.4 Electron Affinity
17 Thermal
17.1 Specific Heat
0.12 J/(kg K)0.12 J/(kg K)
0.11
3.6
17.2 Molar Heat Capacity
29.46 J/mol·K27.20 J/mol·K
16.443
62.7
17.3 Thermal Conductivity
6.30 W/m·K12.00 W/m·K
6.3
429
17.4 Critical Temperature
17.5 Thermal Expansion
17.6 Enthalpy
17.6.1 Enthalpy of Vaporization
17.6.2 Enthalpy of Fusion
17.6.3 Enthalpy of Atomization
17.7 Standard Molar Entropy
NA56.50 J/mol.K
9.5
198.1