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