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Carbon atoms in nanotubes
Carbon nanotubes are cylindrical fullerenes.
Figure 11 represents the structure of a carbon nanotube.
Describe the arrangement of carbon atoms in the nanotube shown in Figure 11.
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Marking points
- 1 Describes the carbon atoms as arranged in hexagonal rings.
Full-mark answer
The carbon atoms are arranged in hexagonal rings around the tube.
Why this answer loses marks
The carbon atoms form long straight rows.
The overall tube shape is not enough; the carbon-atom arrangement must identify the repeating hexagonal rings.