enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. History of atomic theory - Wikipedia

    en.wikipedia.org/wiki/History_of_atomic_theory

    Modern atomic theory is not based on these old concepts. [2] [3] In the early 19th century, the scientist John Dalton noticed that chemical substances seemed to combine with each other by discrete and consistent units of weight, and he decided to use the word atom to refer to these units. [4]

  3. Atomism - Wikipedia

    en.wikipedia.org/wiki/Atomism

    He described atomic theory as a 'Thoroughly materialistic bit of joiners work'. [77] English chemist Alexander Williamson used his Presidential Address to the London Chemical Society in 1869 [78] to defend the atomic theory against its critics and doubters. This in turn led to further meetings at which the positivists again attacked the ...

  4. History of chemistry - Wikipedia

    en.wikipedia.org/wiki/History_of_chemistry

    The law of multiple proportions is one of the basic laws of stoichiometry used to establish the atomic theory. Despite the importance of the work as the first view of atoms as physically real entities and the introduction of a system of chemical symbols, New System of Chemical Philosophy devoted almost as much space to the caloric theory as to ...

  5. Splitting the atom: Why saying who was first is complex - AOL

    www.aol.com/news/splitting-atom-why-saying-first...

    Many people's understanding of atomic science is filtered through the lens of the top secret Manhattan Project, particularly since the Oscar-winning film about one of its most prominent figures, J ...

  6. John Dalton - Wikipedia

    en.wikipedia.org/wiki/John_Dalton

    John Dalton FRS (/ ˈ d ɔː l t ən /; 5 or 6 September 1766 – 27 July 1844) was an English chemist, physicist and meteorologist. [1] He introduced the atomic theory into chemistry.

  7. Leucippus - Wikipedia

    en.wikipedia.org/wiki/Leucippus

    Leucippus's philosophy was conjecture based on a priori evidence, while modern atomic theory is supported by empirical evidence found through the scientific method. [ 77 ] [ 78 ] The main practical difference between Leucippus's atomism and modern atomic theory is the introduction of non-tangible phenomena such as mass–energy equivalence and ...

  8. Atomism (social) - Wikipedia

    en.wikipedia.org/wiki/Atomism_(social)

    Atomism or social atomism is a sociological theory arising from the scientific notion atomic theory, coined by the ancient Greek philosopher Democritus and the Roman philosopher Lucretius. In the scientific rendering of the word, atomism refers to the notion that all matter in the universe is composed of basic indivisible components, or atoms.

  9. Discovery of the neutron - Wikipedia

    en.wikipedia.org/wiki/Discovery_of_the_neutron

    [70] [76] Fermi's theory requires the neutron to be a spin-1 ⁄ 2 particle. The theory preserved the principle of conservation of energy, which had been thrown into question by the continuous energy distribution of beta particles. The basic theory for beta decay proposed by Fermi was the first to show how particles could be created and destroyed.