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Recent Event Highlights: neils bohr/ why it didn't work out, neils bohr/ why was it proposed, Ernest Ruthford atomic theory, Why the model was proposed, Neils bohr/ key features, why his model was rejected or modified/ J.J. thomson, and 1 more...

Created by icey_hero on Mar 1, 2011

Last updated: 03/01/11 at 07:28 PM

• neils bohr/ why it didn't work out
  1943

  could not explain the of sublevels within higher energy levels. could not explain the nature of electrons and neutrons.

• neils bohr/ why was it proposed
  1913

  to include the bright line spectra in hot gases and absorption spectra in cold gases

• neils bohr atomic model
  1913

  came up with atomic model

• Ernest Ruthford atomic theory
  1911

  The day he came up with his atomic model

• Why the model was proposed
  1910

  to account for the alpha particles that deflect and reflect off of gold foil

• Neils bohr/ key features
  Jul 1, 1885

  many electrons within energy shells. radiation between the energy shells. each energy level has a fixed amount of electrons.

• J.J. Thompson
  1884

  atomic theory model

• why his model was rejected or modified/ J.J. thomson
  1877

  Could not explain for the amounts of radiation.

• Key facts about rutherfords model
  Jul 1, 1871

  At the centre of every atom there us a positively charged nucleus. The majority of the mass of an atom is the nucleus.

• why model was rejected, ernest rutherford
  1865

  didn't know about the emission specter of element.

• Why model was proposed
  Jul 1, 1856

  thomson was indeed able to work out a quantitative relationship between the charge and the mass of the negatively charged particles.

• J.J. thomsons key facts
  Jul 1, 1856

  Electrons produce the identical cathode ray particles, which are even smaller than the smallest of atoms. All atoms contain electrons that rotate around the atom.

• John Dalton atomic theory creation
  1808

  He came up with his atomic theory

• why model was proposed
  1803

  To figure out why atoms move the way they do

• Why model was regjected or modified
  Jul 1, 1766

  Contained many inaccuracies, about the masses about atoms

• Key features
  Jul 1, 1766

  All matter is made up of small particles called atoms. Atoms cannot be created, destroyed, or divided into smaller particles.