Home
 Compare Metals

Np Element
Neptunium


Periodic Table
0
Symbol
Np 0
Group Number
Not Available 0
Period Number
7 1
Block
f block 0
Element Family
Actinide 0
CAS Number
7439998 79
Space Group Name
Pnma 0
Space Group Number
62.00 11
Facts
0
Interesting Facts
Not Available 0
Sources
Made by Bombarding Uranium with Neutrons, Ores of metals 0
History
0
Who Discovered
Edwin McMillan and Philip H. Abelson 0
Discovery
In 1940 0
Abundance
0
Abundance In Universe
Not Available 0
Abundance In Sun
~-9999 % 0
Abundance In Meteorites
Not Available 0
Abundance In Earth's Crust
Not Available 0
Abundance In Oceans
Not Available 0
Abundance In Humans
Not Available 0
Uses
0
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.
0
Industrial Uses
NA 0
Medical Uses
NA 0
Other Uses
Alloys, Nuclear Research, Research Purposes 0
Biological Properties
0
Toxicity
Toxic 0
Present in Human Body
No 0
In Blood
0.00 Blood/mg dm-3 37
In Bone
0.00 p.p.m. 36
Physical
0
Melting Point
640.00 °C 62
Boiling Point
3,902.00 °C 13
Appearance
0
Physical State
Solid 0
Color
Silver 0
Luster
Metallic 0
Hardness
0
Mohs Hardness
Not Available 0
Brinell Hardness
Not Available 0
Vickers Hardness
Not Available 0
Speed of Sound
Not Available 0
Optical Properties
0
Refractive Index
Not Available 0
Reflectivity
Not Available 0
Allotropes
No 0
α Allotropes
Not Available 0
β Allotropes
Not Available 0
γ Allotropes
Not Available 0
Chemical
0
Chemical Formula
Np 0
Isotopes
0
Known Isotopes
20 19
Electronegativity
0
Pauling Electronegativity
1.36 29
Sanderson Electronegativity
Not Available 0
Allred Rochow Electronegativity
1.22 26
Mulliken-Jaffe Electronegativity
Not Available 0
Allen Electronegativity
Not Available 0
Electropositivity
0
Pauling Electropositivity
2.64 25
Ionization Energies
0
1st Energy Level
604.50 kJ/mol 50
2nd Energy Level
1,128.00 kJ/mol 72
3rd Energy Level
1,997.00 kJ/mol 74
4th Energy Level
3,242.00 kJ/mol 62
5th Energy Level
Not Available 0
6th Energy Level
Not Available 0
7th Energy level
Not Available 0
8th Energy Level
Not Available 0
9th Energy Level
Not Available 0
10th Energy Level
Not Available 0
11th Energy Level
Not Available 0
12th Energy Level
Not Available 0
13th Energy Level
Not Available 0
14th Energy Level
Not Available 0
15th Energy Level
Not Available 0
16th Energy Level
Not Available 0
17th Energy Level
Not Available 0
18th Energy Level
Not Available 0
19th Energy Level
Not Available 0
20th Energy Level
Not Available 0
21st Energy Level
Not Available 0
22nd Energy Level
Not Available 0
23rd Energy Level
Not Available 0
24th Energy Level
Not Available 0
25th Energy Level
Not Available 0
26th Energy Level
Not Available 0
27th Energy Level
Not Available 0
28th Energy Level
Not Available 0
29th Energy Level
Not Available 0
30th Energy Level
Not Available 0
Electrochemical Equivalent
1.77 g/amp-hr 39
Electron Work Function
Not Available 0
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility 0
Atomic
0
Atomic Number
93 25
Electron Configuration
[Rn] 5f4 6d1 7s2 0
Crystal Structure
Orthorhombic (ORTH) 0
Crystal Lattice
ORTH-Crystal-Structure-of-Neptunium.jpg#100 0
Atom
0
Number of Protons
93 25
Number of Neutrons
144 14
Number of Electrons
93 25
Radius of an Atom
0
Atomic Radius
155.00 pm 30
Covalent Radius
190.00 pm 18
Van der Waals Radius
221.00 pm 22
Atomic Weight
237.00 amu 22
Atomic Volume
11.62 cm3/mol 43
Adjacent Atomic Numbers
0
Previous Element
15 0
Next Element
26 0
Valence Electron Potential
96.00 (-eV) 9
Lattice Constant
666.30 pm 3
Lattice Angles
π/2, π/2, π/2 0
Lattice C/A Ratio
Not Available 0
Mechanical
0
Density
0
Density At Room Temperature
19.38 g/cm3 14
Density When Liquid (at m.p.)
Not Available 0
Tensile Strength
125.00 MPa 14
Viscosity
Not Available 0
Vapor Pressure
0
Vapor Pressure at 1000 K
Not Available 0
Vapor Pressure at 2000 K
0.11 (Pa) 17
Elasticity properties
0
Shear Modulus
Not Available 0
Bulk Modulus
Not Available 0
Young's Modulus
Not Available 0
Poisson Ratio
Not Available 0
Other Mechanical Properties
Ductile 0
Magnetic
0
Magnetic Characteristics
0
Specific Gravity
20.25 6
Magnetic Ordering
Paramagnetic 0
Permeability
Not Available 0
Susceptibility
Not Available 0
Electrical Properties
0
Electrical Property
Conductor 0
Resistivity
1.22 nΩ·m 59
Electrical Conductivity
0.01 106/cm Ω 61
Electron Affinity
Not Available 0
Thermal
0
Specific Heat
0.12 J/(kg K) 40
Molar Heat Capacity
29.46 J/mol·K 8
Thermal Conductivity
6.30 W/m·K 70
Critical Temperature
Not Available 0
Thermal Expansion
Not Available 0
Enthalpy
0
Enthalpy of Vaporization
Not Available 0
Enthalpy of Fusion
3.20 kJ/mol 56
Enthalpy of Atomization
Not Available 0
Standard Molar Entropy
Not Available 0
Summary >>
<< Thermal

Actinide Metals

Compare Actinide Series

Actinide Metals

» More Actinide Metals

Compare Actinide Series

» More Compare Actinide Series
Home | About | Contact | Disclaimer | Terms of use
© A softusvista inc. venture!