原子序数 /yuánzǐ xùshù/ angolul

atomic number [atomic numbers]▼(number of protons)
noun
[UK: ə.ˈtɒ.mɪk ˈnʌm.bə(r)] [US: ə.ˈtɑː.mɪk ˈnʌm.br̩]