Chemistry is defined as the scientific study of atoms and molecules, focusing on their interactions and properties. In contrast, alchemy is an ancient practice that aimed to transform base metals into gold and sought the philosopher's stone, symbolizing the quest for ultimate knowledge and immortality. Alchemy is recognized as a precursor to modern chemistry, blending elements of magic, philosophy, and mysticism with early scientific inquiry. While alchemical theories often contained inaccuracies, they contributed significantly to the development of chemical science, laying foundational concepts that would later be refined and validated through empirical research.