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Tuesday, February 26, 2013


  • Neptunium is a chemical element with the Symbol Np, Atomic number 93, Electron configuration [Rn] 5f4 6d1 7s2,Atomic number 93, Atomic mass 237 u.
  • Neptunium lies in Row 7 of the periodic table.
  • Elements in Row 7 are also called actinide elements.
  • Neptunium is a silvery radioactive synthetic metal.
  • Neptunium is melting point of 640°C (1,180°F) and a density of 20.45 grams per cubic centimeter.

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