Select the word or phrase that complete each sentence (const…

Select the word or phrase that complete each sentence (constitutional isomers, diastereomers, enantiomers, meso compounds, higher, lower, reaction, addition, carbocation, carbanion, nucleophile, electrophile, elimination, heterolysis, homolysis, reagent, substitution, stronger, weaker, charge, concerted, two step, SN1, SN2, racemization, hyperconjugation, alkyl halides, inversion):     Achiral molecules that contain chirality centers are …………………………….          Complete word/phrase and correct spelling (verbatim) is required. No partial credit.