"Atomic model" redirects here. For the unrelated term in mathematical logic, see atomic model (mathematical logic).
This article is about the historical development of understanding the existence and behavior of atoms. For a history of the study of how atoms combine to form molecules, see history of molecular theory. For the modern view of the atom which developed from atomic theory, see atomic physics.
The current theoretical model of the atom involves a dense nucleus surrounded by a probabilistic "cloud" of electrons
Atomic theory is the scientific theory that matter is composed of particles called atoms. The definition of the word "atom" has changed over the years in response to scientific discoveries. Initially, it referred to a hypothetical concept of there being some fundamental particle of matter, too small to be seen by the naked eye, that could not be divided. Then the definition was refined to being the basic particles of the chemical elements, when chemists observed that elements seemed to combine with each other in ratios of small whole numbers. Then physicists discovered that these particles had an internal structure of their own and therefore perhaps did not deserve to be called "atoms", but renaming atoms would have been impractical by that point.
Atomic theory is one of the most important scientific developments in history.
and 28 Related for: History of atomic theory information
Atomictheory is the scientific theory that matter is composed of particles called atoms. The definition of the word "atom" has changed over the years...
in philosophical reasoning rather than scientific reasoning. Modern atomictheory is not based on these old concepts. In the early 19th century, the scientist...
(order theory), in mathematics Atomic (cocktail), a champagne cocktail Atomic (magazine), an Australian computing and technology magazine Atomic Skis,...
an English chemist, physicist and meteorologist. He introduced the atomictheory into chemistry. He also researched colour blindness; as a result, the...
Atomic physics is the field of physics that studies atoms as an isolated system of electrons and an atomic nucleus. Atomic physics typically refers to...
In chemistry, the historyof molecular theory traces the origins of the concept or idea of the existence of strong chemical bonds between two or more...
orbitals—as linear combinations of atomic orbitals (LCAO). These approximations are made by applying the density functional theory (DFT) or Hartree–Fock (HF)...
The theoryof relativity usually encompasses two interrelated physics theories by Albert Einstein: special relativity and general relativity, proposed...
resonance, and molecular orbital theory which includes the linear combination ofatomic orbitals and ligand field theory. Electrostatics are used to describe...
atomic orbitals of the dissociated atoms combine to give individual chemical bonds when a molecule is formed. In contrast, molecular orbital theory has...
The atomic number or nuclear charge number (symbol Z) of a chemical element is the charge number of an atomic nucleus. For ordinary nuclei composed of protons...
man theory is an approach to the study ofhistory popularised in the 19th century according to which history can be largely explained by the impact of great...
and electricity generation. The development of thermodynamics both drove and was driven by atomictheory. It also, albeit in a subtle manner, motivated...
cytology, discovery of DNA, and atomictheory. Recapitulation theory – the theory that "ontogeny recapitulates phylogeny". See Baer's laws of embryology. Telegony...
regardless of their mass. On the other hand, upward motion is due to atomic collisions. Epicureans deviated from older atomist theories like Democritus'...
The atomic units are a system of natural units of measurement that is especially convenient for calculations in atomic physics and related scientific fields...
In chemistry and atomic physics, an electron shell may be thought of as an orbit that electrons follow around an atom's nucleus. The closest shell to...
Nisio, "Formation of Bohr's TheoryofAtomic Constitution," Jap. Studies Hist. Sci, No. 3 (1964), 6-28; J. L. Heilbron, A HistoryofAtomic Models from the...
The periodic table is an arrangement of the chemical elements, structured by their atomic number, electron configuration and recurring chemical properties...
The Atomic Age, also known as the Atomic Era, is the period ofhistory following the detonation of the first nuclear weapon, The Gadget at the Trinity...
Atomic gardening is a form of mutation breeding where plants are exposed to radiation. Some of the mutations produced thereby have turned out to be useful...
In quantum mechanics, an atomic orbital (/ˈɔːrbɪtəl/) is a function describing the location and wave-like behavior of an electron in an atom. This function...
their arguments, each argument being a term. In model theory, atomic formulas are merely strings of symbols with a given signature, which may or may not...
production of tiny integrated circuits for use in electronic devices, especially computers.[citation needed] Atomictheory Cupellation Historyof chromatography...
The historyof electromagnetic theory begins with ancient measures to understand atmospheric electricity, in particular lightning. People then had little...
"central point of an atom". The modern atomic meaning was proposed by Ernest Rutherford in 1912. The adoption of the term "nucleus" to atomictheory, however...
the understanding of the nature of atoms including the discoveries in atomictheory by John Dalton. Around the turn of the 20th century, it was discovered...
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