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  2. 5 days ago · 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 .

    • Atomic Theory

      atomic theory, ancient philosophical speculation that all...

    • Atomism

      atomism, any doctrine that explains complex phenomena in...

    • Vacuum

      Vacuum, space in which there is no matter or in which the...

  3. 3 days ago · Aristotle was one of the most highly revered and respected opponents of the atomic model, and he alternatively proposed that matter is made up of what are now known as the classical elements (water, air, earth, and fire). He believed that all material was some combination of four fundamental elements rather than a combination of indivisible atoms.

  4. 5 days ago · August 1946. President Harry S. Truman signed the Atomic Energy Act into law. The Act transferred nuclear research and development from the Army to civilian control under the Atomic Energy Commission. The nuclear research and production facilities of the Manhattan Project transferred to the AEC on January 1, 1947.

  5. May 7, 2024 · By Laura May 7, 2024May 8, 2024. Inside: Discover how to transform the complex subject of atomic theory into an engaging adventure for curious minds. Explore hands-on activities, an atomic theory timeline, and interactive elements that make learning about atoms accessible and fun. Join us in uncovering the secrets of the atomic world!

  6. 4 days ago · In 1808, Dalton first published New System of Chemical Philosophy (1808–1827), in which he outlined the first modern scientific description of the atomic theory. This work identified chemical elements as a specific type of atom, therefore rejecting Newton 's theory of chemical affinities.

  7. 3 days ago · The double-slit experiment is an experiment in quantum mechanics and optics demonstrating the wave-particle duality of electrons, photons, and other fundamental objects in physics.

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