Back Neptunium Afrikaans ኔፕቲዩኒየም Amharic Neptunio AN नेप्चूनियम ANP نبتونيوم Arabic نيپتونيوم ARY نبتونيوم ARZ Neptuniu AST Neptunium Azerbaijani Нептуний Bashkir
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Neptunium is a chemical element that has the symbol Np on the periodic table. It has the atomic number 93 which means it has 93 protons and electrons in its atoms. It is named after the planet Neptune in the same way as Uranium is named after the planet Uranus.