1 of 15

Slide Notes

DownloadGo Live

Research Project

Published on Nov 18, 2015

No Description

View Outline

MORE DECKS TO EXPLORE

PRESENTATION OUTLINE

1.

DEMOCRITUS (400B.C)

  • He believed all matter consisted of very small particle.
  • he discovered the atom!
  • he said everything was made up of little particles we can't see.
  • Principles of the conservation of energy and their invereducibility of matter
Photo by tonynetone
2.

ARISTOTLE (384-322B.C)

  • all atoms were made up of 4 elements .
  • the elements are wind,air,water,and fire
  • matter had four properties which are cold, hot,wet,and dry.
  • Provide us with the knowledge of natural science including physics on astronomy
  • Aristotle believed that cell matter was made up of "The Four elements" which are fire,earth,air and water. but he didn't have any proof to support his theory.
Photo by nigham
3.

ANTOINE LAVOISIER (1700'S)

  • He made the combustion theory which was based on measurement of sound mass.
  • Mass can not be created nor destroyed.
  • Some people consider him the father of chemistry
  • his findings didn't change the current atom model of his timeline, it just added another element.
  • he found 2 elements that made up water.
4.

JOSEPH LOUIS PROUST (1799)

  • discovered when you have a compound it has the same element.
  • discovered sugar
  • law of proportions parts always have some proportions.
  • has a law named after him Proust law's
5.

JOHN DALTON (1830)

  • studied the behaviors of gases. came up with 5 principals
  • 1.) all matter is made up of invisible atoms. 2.) all atoms are given elements are identical
  • third one atoms of different elements differ. fourth one is atoms of different elements combined the fifth one chemical reactions happen by combinations, separation,or rearrangements.
  • still believed that the atom was the smallest unit of matter, it couldn't be broken down.
  • he believed in Democritus' theory of the atom looked like a marble.
6.

Michael Faraday (1832)

  • made demonstration between electric field and the magnetic field.
  • Realized importance of electrical forces in compounds at a very young age.
  • Discovered electrical forces hold a atom together.
Photo by Keoki Seu
7.

MARIE&PIERRE CURIE (1896)

  • Studied radioactivity
  • Became splitting of unstable atoms.
  • Found out strength of radiation didn't depend on the compound.
  • discovered radium.
  • finding the atomic mass of an atom.
Photo by mielconejo
8.

HENRI BECQUEREL (1896)

  • He made scientist have to change their ideas.
  • There's alpha,beta,gamma types of radioactivity.
  • discovered uranium provided X-ray radiation which led to discover radioactivity
  • showed that the atom wasn't univible
Photo by iharsten
9.

J.J THOMSON (1897)

  • Discovered electrons in the atom could be shown.
  • So atoms were not invisible.
  • Discovered the electron using the cathode ray tube.
  • 1904 he thought the atom was a sphere
  • Also created a mass spectrograph which found the isotopes.
Photo by blmiers2
10.

MAX PLANCK (1900)

  • Quantum theory which explains the construct of energy states atoms
  • Used idea quanta explain hot glowing matter.
  • A spectrum is determined on temperature.
Photo by oosp
11.

ALBERT EINSTEIN (1905)

  • Proved the existence of atoms.
  • Also she'd the strength of the atomic force which was mass which could be changed for radiation
  • His research led up to the atom bomb
Photo by cliff1066™
12.

ROBERT MILLIKAN (1908-1917)

  • Studied Basic properties of electrons
  • Found charge of electricity
  • "Falling drop method" measure of constant charge and quanta electrons
  • Responsible for finding the charge of a single elcetron.
Photo by Cea.
13.

ERNEST RUTHERFORD (1911-1919)

  • Found out the nucleus was dense, small and positively charged.
  • Using "gold foil" experiment he found out some positively charged particles go through
  • Others don't from hitting positively charged particles
  • theory the atom was positive nucleus with negative electrons orbiting around it.
  • Changed the atom greatly because it was now known that most of the atoms weight is in the nucleus
Photo by tonynetone
14.

NIELS BHOR (1922)

  • proposed a new atom model that would allow the electrons to be outside the nucleus
  • said that electrons on a special orbit
  • His model was known as the Bohor model
Photo by Charles P.
15.

JAMES CHADWICK (1932)

  • provided the existence of neutrons.
  • effected the atom model greatly because another substance particle was found in the atom.
  • changed the way the atom was viewed.
Photo by photophilde

Friend of Haiku Deck