Tra từ atomic number - Từ điển Oxford Advanced Learner 8th

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Từ điển Oxford Advanced Learner 8th

atomic number aˌtomic ˈnumber f13 [atomic number] BrE NAmE noun (chemistry) the number of ↑protons in the ↑nucleus (= centre) of an atom, which is characteristic of a chemical element. Elements are placed in the ↑periodic table according to their atomic numbers.