What 2 Things did Democritus say about atoms?
The theory of Democritus held that everything is composed of “atoms,” which are physically, but not geometrically, indivisible; that between atoms, there lies empty space; that atoms are indestructible, and have always been and always will be in motion; that there is an infinite number of atoms and of kinds of atoms.
Did Aristotle believe in atoms?
Aristotle did not believe that matter was made up of tiny particles called atoms, but rather matter up of five basic elements, earth, water, air, fire, and ether.
What did Plato discover about atoms?
He found that there are only five solid shapes whose sides are made from regular polygons (triangles, squares, pentagons, hexagons, etc) – for example, the cube. Plato was so impressed with this discovery that he was convinced that atoms of matter must derive from these five fundamental solids.
What was Democritus’s theory?
Democritus was a central figure in the development of the atomic theory of the universe. He theorized that all material bodies are made up of indivisibly small “atoms.” Aristotle famously rejected atomism in On Generation and Corruption.
What happened to Democritus ideas about atoms?
Democritus was an important philosopher, but he was less influential than another Greek philosopher named Aristotle, who lived about 100 years after Democritus. Aristotle rejected Democritus’ idea of the atom. However, the idea of the atom was revived around 1800 by the English scientist John Dalton.
When did Aristotle discover atoms?
All matter is made of indivisible particles called atoms. 384-322 B.C. Aristotle formalized the gathering of scientific knowledge.
What was Plato’s most famous discovery?
the Republic
What is Plato known for? Plato’s most famous work is the Republic, which details a wise society run by a philosopher. He is also famous for his dialogues (early, middle, and late), which showcase his metaphysical theory of forms—something else he is well known for.
What is JJ Thomson experiment?
J.J. Thomson’s experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. Thomson proposed the plum pudding model of the atom, which had negatively-charged electrons embedded within a positively-charged “soup.”
What was JJ Thomson Discovery?
Thomson, in full Sir Joseph John Thomson, (born December 18, 1856, Cheetham Hill, near Manchester, England—died August 30, 1940, Cambridge, Cambridgeshire), English physicist who helped revolutionize the knowledge of atomic structure by his discovery of the electron (1897).