10. The compounds represented by the structures CH3 CH3 and HT H,C. CH3 H are A) structural isomers. B) identical. C) cis-trans isomers. D) conformers. E) constitutional isomers. The compounds represented by the structures CI H and H CI are A) structural isomers. B) different compounds. C) cis-trans isomers. D) conformers. E) constitutional isomers. 12. In the chlorination of methane, the propagation steps involve forming: A) H radicals B) methyl radicals C) chlorine radicals D) a, b, and c E) b and c