質子數 Save Sign in to save words Simplified: 质子数 zhìzǐshù ㄓˋ ㄗˇ ㄕㄨˋ proton number in nucleus atomic number Character by character 質(zhì)character 子(zǐ)son 數(shù)number Words that sound like zhìzǐshù 紙質書 A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0