Neptunium series

a radioactive series that starts with plutonium-241 and ends with bismuth-209. Neptunium-237 is the longest-lived member of the series. The series does not occur in nature


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  • Neral

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    abbreviation 1. Natural Environment Research Council

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    [nurd] /nɜrd/ noun, Slang. 1. a person considered to be socially awkward, boring, unstylish, etc. 2. an intelligent but single-minded person obsessed with a nonsocial hobby or pursuit: a computer nerd. /nɜːd/ noun (slang) 1. a boring or unpopular person, esp one obsessed with something specified: a computer nerd 2. a stupid and feeble person […]

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