enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Bohr model - Wikipedia

    en.wikipedia.org/wiki/Bohr_model

    In atomic physics, the Bohr model or Rutherford–Bohr model was the first successful model of the atom. Developed from 1911 to 1918 by Niels Bohr and building on Ernest Rutherford 's nuclear model , it supplanted the plum pudding model of J J Thomson only to be replaced by the quantum atomic model in the 1920s.

  3. Electron shell - Wikipedia

    en.wikipedia.org/wiki/Electron_shell

    In 1913, Niels Bohr proposed a model of the atom, giving the arrangement of electrons in their sequential orbits. At that time, Bohr allowed the capacity of the inner orbit of the atom to increase to eight electrons as the atoms got larger, and "in the scheme given below the number of electrons in this [outer] ring is arbitrary put equal to the normal valency of the corresponding element".

  4. File:Stylised atom with three Bohr model orbits and stylised ...

    en.wikipedia.org/wiki/File:Stylised_Lithium_Atom.svg

    * Removed light shadows at the upper right of particles. * Smoothed out electron orbitals into real ellipses. * Made electrons smaller than nuclei. * Changed colors to the more usual blue for electrons, red for protons, and dark gray for neutrons. 07:58, 18 March 2007: 270 × 305 (10 KB) Indolences: edited inkscape svg by hand; file size cut in ...

  5. File:Bohr atom model.svg - Wikipedia

    en.wikipedia.org/wiki/File:Bohr-atom-PAR.svg

    This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.: Attribution: JabberWok You are free: to share – to copy, distribute and transmit the work

  6. Atomic orbital - Wikipedia

    en.wikipedia.org/wiki/Atomic_orbital

    In the Bohr model, an n = 1 electron has a velocity given by =, where Z is the atomic number, is the fine-structure constant, and c is the speed of light. In non-relativistic quantum mechanics, therefore, any atom with an atomic number greater than 137 would require its 1s electrons to be traveling faster than the speed of light.

  7. Extended periodic table - Wikipedia

    en.wikipedia.org/wiki/Extended_periodic_table

    The Bohr model exhibits difficulty for atoms with atomic number greater than 137, for the speed of an electron in a 1s electron orbital, v, is given by v = Z α c ≈ Z c 137.04 {\displaystyle v=Z\alpha c\approx {\frac {Zc}{137.04}}}

  8. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Electron configuration - Wikipedia

    en.wikipedia.org/wiki/Electron_configuration

    His proposals were based on the then current Bohr model of the atom, in which the electron shells were orbits at a fixed distance from the nucleus. Bohr's original configurations would seem strange to a present-day chemist: sulfur was given as 2.4.4.6 instead of 1s 2 2s 2 2p 6 3s 2 3p 4 (2.8.6). Bohr used 4 and 6 following Alfred Werner's 1893 ...