第二級炭素原子 だいにきゅうたんそげんし Meanings Noun secondary carbon atom Kanji 第 No.. Read as ダイ. 二 two 級 grade. Read as キュウ. 炭 carbon. Read as タン. 素 element 原 original. Read as ゲン. 子 child. Read as シ. Word lists Chemistry Jinuma: Japanese Dictionary · Word lists