How to say "carbon" in Japanese

Choosing the right word

カーボンCommon
nounCovers carbon as a substance or material, as in carbon paper or carbon products. A loanword with a practical, product-oriented feel, common in everyday and commercial contexts rather than in chemistry.
炭素たんそJLPT N1approx.Common
nounThe scientific term for carbon as the chemical element (C), used in chemistry and other technical writing. This is the word you want when discussing the element itself, its atomic properties, or its role in compounds.
石炭せきたんは大部分だいぶぶんが炭素たんそから成なっている。↗
Coal consists mostly of carbon.

Use 「カーボン」 for carbon as a material or in everyday/technical talk, and 炭素 for carbon as the chemical element (C) in scientific contexts.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

Japanese equivalents

JLPT vocabulary levels are community estimates, not official (no official lists have been published since the 2010 revision).

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