The Principle of Atom Conservation (POAC) is a rigorous stoichiometric shortcut frequently deployed — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question

💡 Solution & Explanation

POAC is derived directly from the classical conservation laws, assuming atoms are neither created nor destroyed during chemical rearrangements (Option A is true). Because it tracks specific atoms (e.g., all Carbon on the left equals all Carbon on the right), it bypasses the need for balanced stoichiometric coefficients (Options B and C are true). However, POAC utterly fails for nuclear reactions, where atoms undergo fundamental transmutation and mass is converted to energy, violating the core assumption of atom conservation (Option D is false).