atomic number
[əˈtɔmik ˈnʌmbə]
n. 原子序数（指原子在元素周期表中的序号）
[网络] 原子数；原子序号；原子量
atomic numberatomic numbern.1.■原子序数(指元素在周期表中按次序排列的序号)
atomic number1.■【化学】 原子序数[略作at.no.,符号Z,亦作proton number]
见:number: atomic number
atomic numbernoun- (Chemistry)the number of protons in the nucleus of an atom, which is characteristic of a chemical element and determines its place in the periodic table(Symbol: Z)
(化)原子序数（符号： Z）