Pablo Osio : Atomic Timeline

Democritus

400 BCE

Democritus introduced the Idea of the Atom as the building block of matter.
(Source : https://www.britannica.com/biography/Democritus)

Plato

400 BCE

Plato discovered that there are only five shapes whose sides are made from regular polygons, and believed that one of these had to be the shape of the atom.

The Alchemists

1500

Created the Philosopher's stone
(Source : https://www.alchemergy.net/articles/The_Philosophers_Stone-Hauck.pdf )

Robert Boyle

1662

Discovered Boyle's Law, the First Gas Law of Many. (Source : https://www.famousscientists.org/robert-boyle/)

Antoine Lavoisier

1778

Discovered Oxygen
(Source : https://www.britannica.com/biography/Antoine-Lavoisier)

John Dalton

1803

Came up with the First Atomic Theory of Matter
(Source : https://www.britannica.com/biography/John-Dalton)

Amadeo Avogadro

1811

discovered that an equal volumes of different gasses contain the same amount of molecules as long as they are at the same temperature and pressure.
(Source : https://www.britannica.com/biography/Amedeo-Avogadro )

Dmitri Mendeleev

1869

Dmitri Mendeleev made the first periodic table of elements.
(Source : https://www.britannica.com/biography/Dmitri-Mendeleev )

JJ Thompson

1897

JJ Thompson discovered the Electron.
(Source : https://www.britannica.com/biography/J-J-Thomson )

Marie Curie

Apr 20, 1902

Marie Curie discovered Radium and Polonium.
(Source: https://www.britannica.com/biography/Marie-Curie )

Albert Einstein

Sep 17, 1905

Theory of Relativity- E=MC[2]
(source : https://www.britannica.com/biography/Albert-Einstein)

Robert Millikan

1910

Robert Millikan determined the magnitude of the charge of the electron.
(Source : https://www.britannica.com/biography/Robert-Millikan )

Niels Bohr

1913

Niels Bohr proposed a theory for the Hydrogen Atom in 1913 (Source: https://www.nobelprize.org/prizes/physics/1922/bohr/biographical/)

Henry Moseley

1913

Created Moseley's law.
(Source : https://www.britannica.com/biography/Henry-Moseley )

Ernest Rutherford

1922

Ernest Rutherford was known for his studies of Radioactivity, as well as his studies of the atom. He won the Copley medal for it in 1922.
(source : https://www.nobelprize.org/prizes/chemistry/1908/rutherford/biographical/)

Werner Heisenberg

1925

Discovered that the position and momentum of an object cannot both be known in exacts.
(Source : https://www.britannica.com/biography/Werner-Heisenberg )

Erwin Schrodinger

1926

Made the Schrodinger equation to calculate the hydrogen atom's energy level.
(Source : https://www.britannica.com/biography/Erwin-Schrodinger )

James Chadwick

1932

James Chadwick proved the existence of neutrons
(Source : https://www.britannica.com/biography/James-Chadwick )