What are the allotropes of carbon ?

Answer 1

#"Carbon graphite, diamond, and the fullerenes."#

Allotropy is the property of a chemical elements to exist in two or more different forms. Carbon presents some rich examples of allotropy. Depending whether you are at A-level or not, check here or here for details.

Actually, you should check the second site out for the pretty pictures. If you want to vizualize #"buckminsterfullerene"#, which is truly a beautiful structure, think of a football (or a soccer ball if you are a septic).

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Answer 2

Luna Chen

Carbon exists in various forms, including diamond, graphite, graphene, and carbon nanotubes.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.