The correct answer is B. Silicon is not an allotrope of carbon. Allotropes are different forms of the same element that have different physical and chemical properties. Carbon has many allotropes, including diamond, graphite, graphene, fullerenes, and nanotubes. Silicon is a different element with its own set of allotropes.
Diamond is a hard, transparent form of carbon that is used in jewelry and other applications. Graphite is a soft, black form of carbon that is used in pencils and lubricants. Graphene is a single layer of carbon atoms that is the thinnest material known to man. Fullerenes are spherical or ellipsoidal molecules that are made up of carbon atoms. Nanotubes are long, thin tubes that are made up of carbon atoms.
Silicon is a metalloid that is used in a variety of applications, including semiconductors, solar cells, and computer chips. It is a relatively abundant element in the Earth’s crust.
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