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definition of the word nitrogen

by the Wiktionnary

Chemical element
N Previous: carbon (C)
Next: oxygen (O)

From French nitrogène (coined by Lavoisier), corresponding to nitro- + -gen.

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countable and uncountable; nitrogens

nitrogen (countable and uncountable; plural nitrogens)

  1. (uncountable) A chemical element (symbol N) with an atomic number of 7 and atomic weight of 14.0067.
  2. (uncountable) Molecular nitrogen (N2), a colorless, odorless gas at room temperature.
  3. (countable) A specific nitrogen within a chemical formula, or a specific isotope of nitrogen
    The two nitrogens are located next to one another on the ring.

Definition from Wiktionary
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