原子序数 yuán zǐ xù shù

DEFINITIONS

  1. atomic number

CHARACTERS

原 yuán
HSK 4
source, origin, beginning
子 zǐ
HSK 1
offspring, child; fruit, seed of; 1st terrestrial branch
序 xù
HSK 4
series, serial order, sequence
数 shù
HSK 3
number; several, count; fate