English words for 'the sum of the number of neutrons and protons in an atomic nucleus'

As you may have noticed, above you will find words for "the sum of the number of neutrons and protons in an atomic nucleus". Hover the mouse over the word you'd like to know more about to view its definition. Click search related words by phrase or description. to find a better fitting word. Finally, thanks to ChatGPT, the overall results have been greatly improved.

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