On this page I'll provide comprehensive data for Neptunium. I hope you profit from it.
Neptunium Overview
Name Origin
Named for the planet Neptune.
Symbol
Np (Neptunium)Description
Rare, silvery radioactive metal.
Discovery
Discovered By: E.M. McMillan, P.H. Abelson
Year: 1940
Location: United States
Sources
Produced by bombarding uranium with slow neutrons.
Uses
It has no significant commercial applications.
State at 20 °C
solid
Group
Group Name: Rare EarthÂ
Group in periodic table: 0
Period in periodic table:Â 7
Atomic Number
93Learn more about the atomic number.
Atomic Mass
-237,0482
Learn more about the atomic mass.
Stable Isotopes
none
Learn more about stable isotopes.
Radioactive Isotopes
Np234-239
Learn more about radioactive isotopes.
Atomic Structure
Crystalline Structure
Orthorhombic
Learn more about crystalline structure
Shells
Electrons per energy level: 2,8,18,32,22,9,2
Learn more about electron shells
Electron Configuration
1s2 2s2 2p6 3s2 3p6 4 s2 3 d10 4 p6 5 s2 4 d10 5 p6 6 s2 5 d10 4 f14 6 p6 7 s2 6 d1 5 f4
Learn more about electron configuration.
Abbreviated Configuration
[Rn] 5f4 6d1 7s2
Learn more about abbreviated electron configuration.
Valence Electrons
3,4,5,6
Learn more about valence electrons
Atom Size
Atomic Radius
--
Learn more about atomic radius.
Covalent Radius
--
Learn more about covalent radius.
Ionic Radius
--
Learn more about ionic radius.
Molar Volume
11.62 cm³/mol
Learn more about molar volume.
Chemical Properties
Common Oxidation States
First Ionization Energy
First Ionization Potential
Second Ionization Potential
Third Ionization Potential
Physical Properties
Density
Electrical Conductivity
Thermal Conductivity
Elastic Modulus
Coefficient of Thermal Expansion
Learn more about coefficient of thermal expansion.
Heat Properties
Other heat related physical properties:
Melting Point
Boiling Point
Specific Heat
0.12 J/gK
Learn more about specific heat.
Learn more about specific heat.
Heat of Fusion
5.190 kJ/mol
Learn more about heat of fusion.
Heat of Vaporization
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Along with basic element information, it also comes with color coded info about: State (Gas, Liquid or Solid at room temperature), Groups/series details and much more...
How about an incentive to share this post? (You will help other colleagues find this blog)
Download and enjoy this complete and colored periodic table for you to edit and enjoy. It's in an editable excel format or .ods (open).
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[Download open .ods format ##download##][/lock]
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