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单词 atomic number
释义 aˌtomic ˈnumbernoun [c] the number of protons (= very small things with a positive electric charge) that a chemical element has in its centre(nucleus) 原子序数,原子序(化学元素原子核中所含的质子数) elements are arranged in the periodic table according to their atomic number. 元素在周期表(periodic table)中按原子序数(atomic number)多少排列。
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