Chem proj timeline 1st period

Period: 460 to 540

Democritus
Period: 460 to Oct 26, 1974

Timeline
Period: Jan 1, 1743 to Jan 1, 1794

Antoine Lavoisier

Pioneer of stoichiometry
Period: Jan 1, 1766 to Jan 1, 1844

John Dalton
Oct 26, 1785

Law of Conservation of Mass

Antoine Lavoisier
Oct 26, 1803

Dalton's Atomic Theory

John Dalton
Period: Oct 26, 1834 to Oct 26, 1915

Dmitry Meneleev

First version of periodic table
Period: Oct 26, 1855 to Oct 26, 1962

Neils Bohr
Period: Jan 1, 1856 to Jan 1, 1940

J.J. Thomson
Period: Oct 26, 1868 to Oct 26, 1953

Robert Millikan

Photoelectric effect
Period: Oct 26, 1871 to Oct 26, 1937

Ernest rutherford
Period: Oct 26, 1887 to Oct 26, 1961

Erwin Shrodinger
Period: Oct 26, 1887 to Oct 26, 1915

Henry mosely
Period: Oct 26, 1891 to Oct 26, 1974

James Chadwick
Jan 1, 1900

Cathode ray experiment

J.J. Thomson
Jan 1, 1905

Plum pudding model

J.J. Thomson
Oct 26, 1909

Rutherford model

Rutherford
Oct 26, 1909

Gold foil experiment

rutherford
Oct 26, 1913

Bohr planetary model

Niels bohr
Oct 26, 1921

Quantum Mechanical model
Oct 26, 1926

Electron cloud model

Shrodinger
Mar 2, 2022

Atomic and void hypothesises

Democritus