Identify the more stable stereoisomer in the following pair, and choose the reason that explains your choice. cis− or trans−1−isopropyl−3−methylcyclohexa ne the more stable stereoisomer is: cis−1−isopropyl−3−methylcyclohexane trans−1−isopropyl−3−methylcyclohexa ne this is because: cis is more stable than trans in 1,3−disubstituted cyclohexanes. trans−1−isopropyl−3−methylcyclohexa ne has steric hindrance between the methyl and isopropyl groups. trans is more stable than cis in 1,3−disubstituted cyclohexanes. cis−1−isopropyl−3−methylcyclohexane has steric hindrance between the methyl and isopropyl groups.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg