atomic number
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.
Topics Physics and chemistryc2原子序数(指原子在元素周期表中的序号)