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In its free state, carbon exists as graphite or diamond. Graphite is a soft, dark gray form of carbon with a layered structure, while diamond is a clear, crystalline form of carbon with a tightly packed structure. Both forms are stable and do not react easily with other elements.
Carbon: diamond, graphite, glassy graphite, graphene, fullerene etc.
Some examples of nonmetals that exist in a solid state at room temperature include sulfur, carbon (in the form of graphite and diamond), and iodine.
The four allotropes of carbon are diamond, graphite, graphene, and fullerenes (such as buckminsterfullerene). Each allotrope has a unique molecular structure that gives it specific properties and uses.
Graphite is a solid.