• measure theory, an atom is a measurable set that has positive measure and contains no set of smaller positive measures. A measure that has no atoms is...
    9 KB (1,559 words) - 04:39, 2 February 2025
  • Thumbnail for History of atomic theory
    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...
    78 KB (10,108 words) - 16:57, 4 March 2025
  • Thumbnail for Atom
    Atoms are the basic particles of the chemical elements. An atom consists of a nucleus of protons and generally neutrons, surrounded by an electromagnetically...
    126 KB (12,995 words) - 03:09, 12 May 2025
  • Thumbnail for Event (probability theory)
    u<X(\omega )\leq v.} Atom (measure theory) – A measurable set with positive measure that contains no subset of smaller positive measure Complementary event –...
    8 KB (1,142 words) - 08:55, 14 January 2025
  • century) and others, developed distinctive theories of atomism, for example, involving momentary (instantaneous) atoms (kalapas) that flash in and out of existence...
    65 KB (7,718 words) - 10:33, 4 May 2025
  • electrons. Atom(s) may also refer to: Atom (time), a medieval unit of time Atom (measure theory), a minimal measurable set Atom (order theory) Atomic formula...
    4 KB (604 words) - 20:48, 21 May 2025
  • Thumbnail for Bohr model
    the hydrogen atom, compared to the valence shell model. As a theory, it can be derived as a first-order approximation of the hydrogen atom using the broader...
    75 KB (10,383 words) - 08:43, 12 May 2025
  • Thumbnail for Dirac delta function
    beam equation again results in piecewise polynomial deflection. Atom (measure theory) Degenerate distribution Laplacian of the indicator Uncertainty principle...
    96 KB (14,230 words) - 04:36, 14 May 2025
  • Thumbnail for Elementary event
    Elementary event (category Experiment (probability theory))
    the full power set. Atom (measure theory) – A measurable set with positive measure that contains no subset of smaller positive measure Pairwise independent...
    3 KB (439 words) - 07:27, 26 January 2025
  • In probability theory, a random measure is a measure-valued random element. Random measures are for example used in the theory of random processes, where...
    9 KB (1,319 words) - 15:24, 2 December 2024
  • valence bond theory cannot explain. In molecular orbital theory, electrons in a molecule are not assigned to individual chemical bonds between atoms, but are...
    28 KB (3,688 words) - 16:56, 11 May 2025
  • measure-preserving dynamical system is an object of study in the abstract formulation of dynamical systems, and ergodic theory in particular. Measure-preserving...
    23 KB (3,592 words) - 05:13, 10 May 2025
  • spelling) or valency (British spelling) of an atom is a measure of its combining capacity with other atoms when it forms chemical compounds or molecules...
    40 KB (2,914 words) - 12:59, 11 January 2025
  • Thumbnail for Hydrogen atom
    A hydrogen atom is an atom of the chemical element hydrogen. The electrically neutral hydrogen atom contains a single positively charged proton in the...
    39 KB (6,024 words) - 20:13, 4 April 2025
  • Phonon (redirect from Atom vibrations)
    lattice is regular. Ri is the position coordinate of the ith atom, which we now measure from its equilibrium position. The sum over nearest neighbors...
    48 KB (6,990 words) - 12:11, 7 May 2025
  • Thumbnail for Law of multiple proportions
    it. The discovery of this pattern led Dalton to develop the modern theory of atoms, as it suggested that the elements combine with each other in multiples...
    9 KB (1,331 words) - 16:13, 11 September 2024
  • Thumbnail for Big Bang
    Big Bang (redirect from Primordial atom)
    of dark energy, called phantom energy theories, suggest that ultimately galaxy clusters, stars, planets, atoms, nuclei, and matter itself will be torn...
    150 KB (16,042 words) - 15:15, 21 May 2025
  • Thumbnail for Rydberg atom
    A Rydberg atom is an excited atom with one or more electrons that have a very high principal quantum number, n. The higher the value of n, the farther...
    51 KB (5,774 words) - 22:25, 10 February 2025
  • lasers while the source emits matter waves (the atoms) rather than light. Atom interferometers measure the difference in phase between atomic matter waves...
    20 KB (1,957 words) - 13:21, 25 December 2024
  • gases. The successes of kinetic theory gave further credence to the idea that matter is composed of atoms, yet the theory also had shortcomings that would...
    77 KB (9,386 words) - 10:44, 4 May 2025
  • Thumbnail for Stern–Gerlach experiment
    showed that this apparatus could be used to measure nuclear spin whenever the electronic configuration of the atom was known. The concept was applied by Rabi...
    30 KB (3,465 words) - 07:03, 7 May 2025
  • Thumbnail for Excited state
    In quantum mechanics, an excited state of a system (such as an atom, molecule or nucleus) is any quantum state of the system that has a higher energy than...
    9 KB (955 words) - 19:37, 16 April 2025
  • Thumbnail for London dispersion force
    atom induce a corresponding redistribution of electrons in other atoms, such that the electron motions become correlated. While the detailed theory requires...
    13 KB (1,615 words) - 12:38, 8 March 2025
  • Thumbnail for Quantum mechanics
    physical theory that describes the behavior of matter and of light; its unusual characteristics typically occur at and below the scale of atoms.: 1.1  It...
    99 KB (12,153 words) - 17:39, 19 May 2025
  • In chemistry, bond order is a formal measure of the multiplicity of a covalent bond between two atoms. As introduced by Gerhard Herzberg, building off...
    9 KB (1,285 words) - 19:04, 14 March 2025
  • learned that every atom has a nucleus where all of its positive charge and most of its mass is concentrated. They deduced this after measuring how an alpha...
    100 KB (13,585 words) - 15:56, 18 April 2025
  • Thumbnail for Dirac measure
    space X. We can also say that the measure is a single atom at x; however, treating the Dirac measure as an atomic measure is not correct when we consider...
    6 KB (640 words) - 04:31, 19 December 2022
  • theory — Measure theory — Model theory — Module theory — Morse theory — Nevanlinna theory — Number theory — Obstruction theory — Operator theory — Order...
    38 KB (4,341 words) - 16:45, 7 April 2025
  • Thumbnail for Mole (unit)
    Mole (unit) (redirect from Gramme-atom)
    N/NA is a measure of the amount of substance (with the unit mole). Depending on the nature of the substance, an elementary entity may be an atom, a molecule...
    27 KB (3,413 words) - 14:21, 3 May 2025
  • Ergodicity (redirect from Ergodic measure)
    founded on the formal definitions of measure theory and dynamical systems, and rather specifically on the notion of a measure-preserving dynamical system. The...
    55 KB (8,940 words) - 01:22, 22 May 2025