Atomic Theory Timeline
Category: Other
Updated: 29 Oct 2019
Contributors
Created byHollis Munson
Attachments
Events
Charles Goodyear Accidentaly invented rubber.Sir Isaac Newton
Proposed the world be universe to be made with
"small solid masses in motion".William Crookes
Discoverd the Cathrode RayG.J. Stoney
Proposed the electron.J J Thompson
Discovers the charge to mass ratio of an electronErnest Rutherford
Estimated toe size of an atom.Hantaro Nagaoka
Created an atomic model with electrons
rotating around a single positive charge.Ernest Rutherford
Won Nobel Peace Prize for
his discovories.Francis Aston
Discovered Isotopes using a
mass spectograph.Enrico Fermi
Made an experiment that realeased energy
from an atom.Periods
Democritus
- The Greek philosopher Democritus was the
first person to propose the idea that matter was
not infinitely divisible. He thought that matter
was created of "atmos" which is where the word atom came from.Aristotle
One of the most influential philosophers,
Aristotle was key in the rejection of the concept
of the atom.John Dalton
John Dalton revived and revised
Democritus's ideas based upon the
results of scientific research he conducted.
He came up with the atomic theory.J J Thompson
used cathode rays to discover the electron
measured the bending of the rays to determne the charge to mass ratio of the electron
modified cathode ray tubes were used to discover the positively charged proton
- Plum Pudding Model
Comments