Atomic Theory

Scientific Timeline

Joseph Priestly - Oxygen, Carbon Monoxide, and Nitrogen Dioxide

1774

Antoine Lavoisier - Law of Conservation of Mass

1785

Alessandro Volta - Electrochemical Cell and batteries

1800

John Dalton proposes Atomic Theory

1803

Dalton's theory states that :

All matter is composed of atoms
Atoms cannot be made or destroyed
All atoms of the same element are identical
Different elements have different types of atoms
Chemical reactions occur when atoms are rearranged
Compounds are formed from atoms of the constituent elements

Michael Faraday - electricity and electrochemistry

1821

Louis Pasteur - Pasteurization

1862

Alfred Nobel - Dynamite

1866

Eugen Goldstein discovers that atoms have a charge

1886

Marie Curie - Radioactivity

1890

Guglielmo Marconi - radio

1895

Henri Becquerel - Radioactivity

1896

J.J. Thompson suggests Plum Pudding Model

1897

Max Planck formulates Quantum Theory

1900

Alfred Nobel - Nobel Prize

1901

Albert Einstein formulates Special Theory of Relativity

1905

Robert Millikan measures the charge of the electron

1908

Ernest Rutherford proposed Rutherford's Planetary Modelof the Atom

1911

Henry Mosely contributed in the rearrangement of the Periodic Table

1913

Niels Bohr proposes the Bohr Model of the Atom

1915

Louis de Broglie proposed that all electrons behave like waves

1921

Frederick Banting - isolated insulin

1922

Werner Heisenberg formulated the Uncertainty Principle

1923

Erwin Schrodinger developed the modern equation

1926

Milo Farnsworth - TV

1927

James Chadwick discovers the Nuetron

1932

Wallace Carothers - neoprene and nylon

1935

Leo Szilard - Nuclear Chain Reactions and Atomic Bomb

1942

Kary Mullis - polymerase chain reaction

1985

Historical events

Gutenberg Printing Press

1450

Discovery of the Americas

1492

Catholic Reformation

1517

Galileo convicted of heresy

1633

Declaration of Independence

1776

Civil War

1861

First Transcontinental Railroad

1869

Assassination of Archduke Ferdinand

1914

Bolsheivik Revolution

1917

Treaty of Versailles

1919

Bombing of Pearl Harbor

1941

First Cellular Phone

1973

Initial Concept of Internet

1990