Carbon
/kˈɑrbən/
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Definition
(noun) The chemical element (symbol C) with an atomic number of 6. It can be found in pure form for example as graphite, a black, shiny and very soft material, or diamond, a colourless, transparent, crystalline solid and the hardest known material.
Sentence Examples
Trees give off oxygen and absorb carbon dioxide.
Coal consists mostly of carbon.
CEFR Practice Quiz
Diamond is a form of pure ____ that is found deep inside the earth.