What greek philosopher was the first person to propose the idea that matter is made of tiny individual particles called atoms?

Democritus was the one who came up with the concept and the name (atomos in Greek means "no-cut")./n. / nDemocritus was mostly lucky, not prescient; the scientific method in ancient Greece largely consisted of coming up with as many wacky ideas as they possibly could, under the theory that eventually someone's wacky idea was bound to be right.