| 单词 |
atomic-number |
| 释义 |
a·tom·ic num·ber noun /əˌtɒmɪk ˈnʌmbə(r)/ /əˌtɑːmɪk ˈnʌmbər/ (chemistry)- the number of protons in the nucleus (= centre) of an atom of a particular chemical element. Elements are placed in the periodic table according to their atomic numbers.原子序数（指原子在元素周期表中的序号）Topics Physics and chemistryc2
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