Question

24 sep evaluate information graphite is a soft substance used in writing instruments like pencils. carbon nanotubes are the hardest substance known to humans. both are made entirely of carbon atoms. explain why each allotrope has such different properties.

Explanation:

The properties of carbon allotropes depend on their atomic - level structures. In graphite, carbon atoms are arranged in layers with weak inter - layer forces, allowing layers to slide over each other, making it soft. Carbon nanotubes have a cylindrical structure with carbon atoms covalently bonded in a strong, continuous network, giving them high hardness.

Answer:

The different properties of graphite and carbon nanotubes are due to their distinct atomic - level structures. Graphite has carbon atoms arranged in layers with weak inter - layer forces, enabling the layers to slide and making it soft. Carbon nanotubes have a cylindrical structure with strong covalent bonds between carbon atoms throughout the tube, resulting in high hardness.