Neptunium VMRO-NP Masalah P versus NP (499986) 2011 NP Diagram np 2012 NP .np Neptunosena ISO 3166-2:NP Neptunium(VII) oksida-hidroksida Neptunium(III) klorida Neptunium(III) bromida Neptunium(IV) fluorida Neptunium(III) iodida Neptunium(V) fluorida Neptunium(III) fluorida Neptunium(VI) fluorida Reaksi (n-p) Nepal