电子层数 diàn zǐ céng shù

DEFINITIONS

  1. electron shell number (chemistry)

CHARACTERS

电 diàn
HSK 1
electricity; electric; lightning
子 zǐ
HSK 1
offspring, child; fruit, seed of; 1st terrestrial branch
层 céng
HSK 3
story, layer, floor, stratum
数 shù
HSK 3
number; several, count; fate