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neptwniwm

From Wiktionary, the free dictionary

Welsh

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Chemical element (edit)
Np
Atomic number 93
neptwniwm
Classification data
Period 7
Group 3
Block f-block
Class actinide
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Etymology

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Borrowed from English neptunium, from English Neptune, from Latin Neptūnus, therefore possible cognate with Welsh nef (“heaven”).

Pronunciation

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Noun

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neptwniwm m (uncountable, not mutable)

  1. neptunium