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Name and describe the difterent allotropes of carbon. Match the words in the left column to the appropriate blanks in the sentences on the right. graphite - Soccer-ball-shaped clusters of 60 carbon atoms and are black solids. diamond - Carbon atoms are arranged in sheets. fullerenes nanotubes - Each carbon atorn forms four covalent bonds to four other carbon atoms in a tetrahedral geometry. - Long carbon structures, which consist of sheets of interconnected C6 rings that assume the shape of a cylinder