I need uses of acid-base indicators

Indicate whether the specified alkyl halides will form primarily substitution products, only elimination products, both substitution and elimination products, or no products when they react with sodium methoxide. 1-bromobutane 1-bromo-2-methylpropane 2-bromobutane 2-bromo-2-methylpropane

Which of these conditions most likely produces an unstable isotope?

  the mississippians were considered to be  horticulturalists, which means they were