(chemistry only) Distinguish atom economy from percentage yield when evaluating a reaction.

Atom economy and percentage yield are both measures used to evaluate the efficiency of chemical reactions, but they focus on different aspects. Atom economy assesses the proportion of reactants that become useful products in a reaction, emphasizing sustainability and resource efficiency. In contrast, percentage yield compares the actual amount of product obtained to the theoretical maximum, highlighting practical outcomes. Understanding both concepts helps chemists optimize reactions for better environmental and economic outcomes, ensuring that more of the starting materials are converted into desired products while minimizing waste.