carbon

boron $\longleftarrow$ 6 $\longrightarrow$ nitrogen

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Carbon

Noun

Carbon's place on the periodic table

(uncountable) The chemical element (symbol C) with an atomic number of 6.
(countable); (informal) A piece of carbon paper.
Make sure the carbon is facing the second sheet of paper, before rolling it into the typewriter.
(countable); (informal) A carbon copy.
A fossil fuel that is made of impure carbon, such as coal or charcoal.
(uncountable); (ecology) Carbon dioxide, when talking about global warming and climate change.
Carbon dioxide makes up less than 1% of the atmosphere.