http://www.abcte.org/files/previews/chemistry/s1_p1.html

In this lesson, we will review the development of the atomic theory. ... One of the first atomic theorists was Democritus, a Greek philosopher who lived in the fifth ...

https://www.universetoday.com/60058/democritus-atom/

Dec 11, 2015 ... This is due to his theory of universe that is made up of tiny “atoms”, which bears .... Democritus' model of an atom was one of an intert solid that ...

https://www.ck12.org/chemistry/democritus-idea-of-the-atom/lesson/Democrituss-Idea-of-the-Atom-MS-PS/

Aug 3, 2016 ... Democritus' idea of the atom has been called “the best guess in antiquity.” That's because it was correct in many ways, yet it was based on pure ...

http://pages.mtu.edu/~pcharles/SCIHISTORY/Democritus.html

Oct 17, 1997 ... The atoms had various shapes, Democritus thought, for "why should they have one shape rather than another?" All change was to be ...

https://www.windows2universe.org/people/ancient_epoch/democritus.html

Democritus was a Greek philosopher who lived between 470-380 B.C. He developed the concept of the 'atom', Greek for 'indivisible'. Democritus believed that ...

http://thehistoryoftheatom.weebly.com/democritus.html

Democritus's model stated that matter consists of invisible particles called atoms ... His atomic model was solid, and stated all atoms differ in size, shape, mass, ...

https://en.wikipedia.org/wiki/Democritus

Democritus was an Ancient Greek pre-Socratic philosopher primarily remembered today for his ... Their speculation on atoms, taken from Leucippus, bears a passing and partial resemblance to the 19th-century .... Most sources say that Democritus followed in the tradition of Leucippus and that they carried on the scientific ...

https://plato.stanford.edu/entries/democritus/

Aug 15, 2004 ... According to ancient reports, Democritus was born about 460 BCE (thus, ... say— are caused by rearrangements or additions to the atoms ...

https://courses.lumenlearning.com/cheminter/chapter/democritus-idea-of-the-atom/

One of these philosophers was Democritus (c. 460–370 BCE), often referred to as the “laughing philosopher” because of his emphasis on cheerfulness.

https://www.encyclopedia.com/people/philosophy-and-religion/philosophy-biographies/democritus

According to Posidonius in the first century b.c., the theory of atoms was a very old .... All events are determined, and if Cicero is right at all in saying Democritus  ...