氮 (dàn) - Nitrogen — a chemical element (symbol N, atomic

氮Tone 4

dàn ｜ 12 strokes ｜ radical:

橙丁

氮 · dàn

Nitrogen — a chemical element (symbol N, atomic number 7), a colorless, odorless, inert gas that constitutes about 78% of Earth's atmosphere.

Nitrogen — a chemical element (symbol N, atomic

Usage highlights

Nitrogen gasNitrogen fertilizerNitrogen fixationLiquid nitrogenNitrogen cycleNitrogen oxide

Synonyms

Antonyms

  • 氧— oxygen (different atmospheric gas)

Usage & contexts

Examples

  • Nitrogen is essential for plant growth (氮肥).
  • The atmosphere contains about 78% nitrogen (氮气).
  • Nitrogen fixation converts atmospheric nitrogen into usable forms (固氮).
  • Liquid nitrogen is used for cryogenic applications (液氮).

Collocations

  • Nitrogen gas(氮气)
  • Nitrogen fertilizer(氮肥)
  • Nitrogen fixation(固氮)
  • Liquid nitrogen(液氮)
  • Nitrogen cycle(氮循环)
  • Nitrogen oxide(氮氧化物)

Idioms

  • Nitrogen fixation by rhizobia(根瘤菌固氮)
  • Nitrogen and phosphorus fertilizers(氮磷肥料)
  • Nitrogen oxide emissions(氮氧化物排放)

Cultural background

FAQ
  • Nitrogen was discovered in the 18th century and named for its presence in niter (saltpeter).
  • In Chinese, the character combines '气' (gas) radical with phonetic component '淡', indicating its gaseous nature.
  • Nitrogen is crucial in agriculture as a key component of fertilizers for crop production.
  • The nitrogen cycle is fundamental to ecosystem functioning and biogeochemical processes.

FAQ