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X-ray diffraction shows that all six carbon-carbon bonds in benzene are of the same length, at 140 picometres (pm). [57] The C–C bond lengths are greater than a double bond (135 pm) but shorter than a single bond (147 pm).
Sulfur extraction, East Java A man carrying sulfur blocks from Kawah Ijen, a volcano in East Java, Indonesia, 2009 32 S is created inside massive stars, at a depth where the temperature exceeds 2.5×10 9 K, by the fusion of one nucleus of silicon plus one nucleus of helium. [ 38 ]