1. Problems...
... doped, highly anisotropic metallic conductors. The conductivity is about one million times greater in the plane of the graphite rings than at right angles to this plane: (parallel)/(perpendicular) = 106 . Correspondingly, the conductivity of stretchoriented polyacetylene is some 100 times higher in the stretch direction than perpendicular to it. The smaller 4 anisotropy ... excited electron are opposite each other, so that S is still zero (S=1/2 - 1/2=0), the excited state is a singlet state (not magnetic) whereas if the two spins are parallel, S = 1/2+1/2=1, the state is said to be a t...
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- Grade Level: High School