. . . . . . . . is not a allotrope of carbon A. Buckminsterflorence B. Carbon dioxide C. Diamond D. Graphite

Buckminsterflorence
Carbon dioxide
Diamond
Graphite

The correct answer is $\boxed{\text{Carbon dioxide}}$.

An allotrope is a form of an element that has a different structure than other forms of the same element. Carbon has many allotropes, including diamond, graphite, buckminsterfullerene, and carbon nanotubes.

  • Diamond is a hard, transparent allotrope of carbon. It is made up of carbon atoms that are arranged in a tetrahedral structure.
  • Graphite is a soft, black allotrope of carbon. It is made up of carbon atoms that are arranged in a hexagonal structure.
  • Buckminsterfullerene is a spherical allotrope of carbon. It is made up of 60 carbon atoms that are arranged in a soccer ball-like structure.
  • Carbon nanotubes are long, thin tubes of carbon atoms. They are made up of carbon atoms that are arranged in a hexagonal structure.

Carbon dioxide is a gas that is made up of one carbon atom and two oxygen atoms. It is not an allotrope of carbon because it does not have the same structure as other forms of carbon.