Atomic Theory Timeline

Isaac Newton

Jan 1, 1704

Born: 25th December 1642
Death: 20th March 1727
Suggested our universe was mechanical.

John Dalton

Oct 19, 1803

Born: 5th or 6th of September 1766
Death: 27th July 1844
Discovered Atoms were solid spheres and were measured by properties of mass.

Michael Faraday

Oct 19, 1832

Born: 22nd September 1791
Death: 25th August 1867
Discovered electrolysis which is how certain solutions react to electricity.

Julius Plucker

Oct 19, 1859

Born: 16th June 1801
Death: 22 May 1868
He was one of the first people to build a gas discharge tube.

Dmitri Mendeleev

Oct 19, 1869

Born: 1834
Death: 1907
Ordered every element into seven different groups. He sorted them by their atomic weight, which is a formula he discovered.

George Johnstone Stoney

Oct 19, 1879

Born: 15th February 1826
Death: 5th July 1911
George Stoney suggested that electricity was made up of particles that were negative, and called them electrons.

Frances William Aston

Oct 20, 1919

Born: September 1877
Death: 20th November 1945
Located isotopes with a mass spectrograph and confirmed their existence.

Niels Bohr

Oct 20, 1922

Born: 7th October 1885
Death: 18th November 1962
Developed a hypothetical report on the structure of atoms.

James Chadwick

Oct 20, 1932

Born: 20th October 1891
Death: 24th July 1974
James Chadwick discovered the Neutron which helped solve the weight of atoms.

Antoine Lavoisier

Apr 26, 2013

(ignore the date up the top because I couldn't find the exact date the discovery was made)
Born: 26th August 1743
Death: 8th May 1794
Discovered hydrogen and oxygen and named them.