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Neptunium · chemical symbol

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Neptunium has 93 protons in every atomic nucleus. Changing that number would make a different element. Source: Neptunium ↗

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  1. 94Plutonium · chemical symbolRECALL
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    Atomic number 94

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  2. 95Americium · chemical symbolRECALL
    Am

    Atomic number 95

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  3. 96Curium · chemical symbolRECALL
    Cm

    Atomic number 96

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