93Np
Neptunium
넵투늄 · ネプツニウム
Actinide
Atomic number93
ElementNp — Neptunium
Atomic mass237
CategoryActinide
Group3
Period7
Electron config[Rn] 5f4 6d1 7s2
Shells2,8,18,32,22,9,2
State (RT)Solid
Melting pt644°C
Boiling pt3902°C
Electronegativity1.36
Discovered1940
Main usesNeutron detectors, research
2 · 8 · 18 · 32 · 22 · 9 · 2
Group 3
Sc ScandiumY YttriumLa LanthanumCe CeriumPr PraseodymiumNd NeodymiumPm PromethiumSm SamariumEu EuropiumGd GadoliniumTb TerbiumDy DysprosiumHo HolmiumEr ErbiumTm ThuliumYb YtterbiumLu LutetiumAc ActiniumTh ThoriumPa ProtactiniumU UraniumPu PlutoniumAm AmericiumCm CuriumBk BerkeliumCf CaliforniumEs EinsteiniumFm FermiumMd MendeleviumNo NobeliumLr Lawrencium