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Timeline of Atomic Theory - Coggle Diagram
Timeline of Atomic Theory
1) Leucippus + Democritus- Greek Era
5) Sir William Crookes- 1879
12) Ernest Rutherford- 1911
10) Albert Einstein- 1905
7) JJ. Thomson- 1897
3) John Dalton- 1803
14) Heisenberg- 1927
9) Marie Curie- 1898
8) Rutherford- 1898
11) R.A. Millikan- 1909
6) Eugen Goldstein- 1886
4) J. Plucker- 1859
13) Neils Bohr- 1922
2) Isaac Newton- 1704
15) Lise Meitner- 1932
1) Discovered " A Tomos" which means indivisible or uncuttable. They thought they could keep cutting things in till they cant cut it anymore.
2) Proposed a mechanical universe with small masses
3) Proposed an atomic theory with spherical solid atoms based on measurable states of mass
4) built one of the first cathode ray tubes
5) discovered many important things about cathodes; traveling in straight lines; cause glass to fluoresce; are deflected by magnetic fields suggesting negative charge
6) studied "canal rays" which had electrical and magnetic properties opposite of an electron
7) used a CRT to experimentally find the charge to mass ratio of an electron
8) concluded that the mass was concentrated in the nucleus
9) studied uranium and thorium and called their spontaneous decay " radioactivity"
10) released the famous equation E=mc2
11) determined the charge and mass of an electron
12) he established that the nucleus was very dense and positively charged by using alpha particles and gold foil
13)developed an explanation of atomic structure that underlies regularities of the periodic table of elements
14) proposed the Principle of Indeterminancy stating you can never know both the position and velocity of a particle.
15) conducted experiments verifying that heavy elements capture neutrons and form unstable products which under go fission.