dipity

Chemistry Class Project Atom

Created by goose1 on Oct 2, 2008

Last updated: 03/04/10 at 11:15 AM

• Dipity Timeline Created
  Oct 2, 2008 2:24 PM

• Neils Bohr
  1922

  He help to increase the modern knowledge of the structure of the atom. He also helped to create the first atomic bomb.
  http://web.gc.cuny.edu/sciart/copenhagen/nyc/images/Bohr.jpg

• Discovery of the Proton
  1918

  Rutherford determined that small particles called, protons have a +1 charge.

• Robert Millikin
  1909

  He was a American physicist who determine that the charge of a electron has a negative one charge and the mass of an electron is 1/1840. Which is the mass of a hydrogen atom.
  http://www.fordhamprep.org/gcurran/sho/sho/images/millikan.gif

• J.J. Thompsan
  1879

  He was a British physicist who discovered that "cathode rays" were negative charged particles. These negative charged particles are called electrons
  http://www.manep.ch/img/photo/challenges/nanotubes/thompson.jpg

• William Crookes
  1875

  He was the inventor of the cathode ray tube or "Crookes tube", where cathode rays were discovered. When the tubes were connected plus with a voltage, the "rays" were able to be seen going across the tube, glowing. These tubes eventually became today's TV tubes.
  http://www.gutenberg.org/files/20417/20417-h/images/image389a.jpg

• John Dalton
  Jan 1, 1766

  He was a British schoolteacher that developed the modern atomic theort
  http://www.learner.org/channel/courses/essential/physicalsci/images/s4.dalton.jpg

• Lavoisier
  Jan 1, 1743

  He is known as the "Father of modern chemistry. He developed the Law of Conservation of Mass, the metric system and wrote the first elements. He also named Oxygen and Hydrogen. He lost his head during the French Revolution.
  http://upload.wikimedia.org/wikipedia/commons/thumb/9/96/Antoine_lavoisier.jpg/300px-Antoine_lavoisier.jpg

• The Scientist who discovered Atoms
  Jan 1, 460

  Democritus was the first to propose that tiny particles, atomos made matter. It can not be created, destroyed, or divided.
  http://www.columbia.k12.mo.us/jjhs/Technology/S&E0506/khanm/d-man.jpg

• Aristotle
  Jan 1, 384

  Aristotle he believe that air, fire, water, or earth was matter.
  http://www.wwu.edu/depts/skywise/cosmo/aristotle.jpg