While the concept of elements has been around for centuries, the modern idea of elements and compounds is generally attributed to Robert Boyle in his book "The Sceptical Chymist" published in 1661.

Here's why:

* Before Boyle: Alchemists and early chemists had ideas about elements, but they often mixed philosophical and mystical concepts with scientific observations. They believed in the four elements of earth, air, fire, and water as the fundamental building blocks.

* Boyle's Contribution: Boyle challenged the traditional four-element theory. He defined an element as a substance that cannot be broken down into simpler substances by chemical means. This definition laid the foundation for the modern concept of elements. He also proposed that chemical reactions involve the rearrangement of particles, leading to the formation of new substances (compounds).

While Boyle's work was foundational, the development of the modern periodic table and the understanding of atomic structure in the 19th and 20th centuries further refined and expanded our understanding of elements and compounds.