It is observed in the case of combining ground state atomic yttrium to ethane, and unlike its companion type proceeds in one step.  It is less likely 
It is observed in the case of combining ground state atomic yttrium to ethane, and unlike its companion type proceeds in one step.  It is less likely to occur when dealing with a secondary compound, however, in the presence of a tertiary compound and any alkoxide ion, or strong base, it predominates.  This mechanism is the best evidenced by the dehydrohalogenation of alkyl halides to produce alkenes in which case it takes precedence over any type of substitution reactions.  FTP, identify this type of reaction, so named because it is a second-order elimination.
It is observed in the case of combining ground state atomic yttrium to ethane, and unlike its companion type proceeds in one step.  
E2 or elimination bimolecular (accept second-order elimination before it's mentioned; prompt on "elimination")