| 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。 |