1. The problem statement, all variables and given/known data Name this molecule 2. Relevant equations Naming cycloalkanes: 1) The functional groups should receive the lowest carbon number. 2) Any substituents are then assigned carbon numbers. 3. The attempt at a solution Following the above two rules, shouldn't the molecule therefore be named 1-methyl-3-chlorocyclobutane? The key however says 1-chloro-3-methylcyclobutane. Please advise.