化か学がく記き号ごう

noun

chemical symbol

Refers to the one- or two-letter abbreviations for chemical elements, such as H for hydrogen or Fe for iron.

• 水みずの化か学がく記き号ごうはH₂Oです。

  The chemical symbol for water is H₂O.

• 元げん素その化か学がく記き号ごうを覚おぼえるのは大たい変へんだ。

  Memorizing the chemical symbols of the elements is tough.