How did Robert Boyle help develop the modern concept of a chemical element?

Robert Boyle played a pivotal role in transitioning chemistry from ancient philosophical speculation to a modern, evidence-based science. In his 1661 work, The Sceptical Chymist, he challenged the long-standing Aristotelian view that all matter was composed of four elements—earth, air, fire, and water—as well as the alchemical principles of salt, sulfur, and mercury.12

Boyle argued that these traditional concepts were inadequate because they could not be extracted from substances nor combined to form them. Instead, he proposed a more operational definition of a chemical element, emphasizing the physical nature of substances and their ability to be identified through chemical analysis.1

By rejecting abstract qualities in favor of a mechanical, corpuscularian hypothesis—which posited that matter is composed of minute particles—Boyle established the foundation for the modern understanding of elements as fundamental substances that can be distinguished through experimental observation and quantitative study. This shift toward rigorous experimentation allowed later scientists, such as Antoine-Laurent Lavoisier, to develop the first systematic lists of elemental substances.312