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  • 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 640C (1,180F) and a density of 20.45 grams per cubic centimeter.

  • Neptunium is harmful due to its radioactivity.

  • Neptunium forms numerous chemical compounds.

  • Neptunium and its compounds of neptunium have been made for research purposes.

  • Neptunium is a ductile, silver-colored metal about twice as dense as lead.

  • Chemically it is extremely reactive and is attacked by oxygen, steam and acids, but not by alkalis.

  • Neptunium is prepared by the reduction of NpF3 with barium or lithium vapor at about 1200oC.

  • Neptunium forms numerous chemical compounds.

  • Neptunium is the first transuranium element.

  • Neptunium is used commercially only in specialized detection devices.

  • Neptunium was once a very rare element, but it can now be somewhat easily produced in a nuclear reactor.

  • The element is named after the planet Neptune.

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