John Dalton

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Understanding John Dalton's atomic theory of matter

How scientists discovered atoms

John Dalton, detail of an engraving by W. Worthington, after a portrait by William Allen, 1814.

For Students

John Dalton, detail of an engraving by W. Worthington, after a portrait by William Allen, 1814.

John Dalton summary

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John Dalton: Facts & Related Content

Written and fact-checked by The Information Architects of Encyclopaedia Britannica

Facts

Born	September 5, 1766 or September 6, 1766 • England
Died	July 27, 1844 • Manchester • England
Founder	British Science Association
Notable Works	“Meteorological Observations and Essays” • “New System of Chemical Philosophy”
Subjects Of Study	Charles’s law • Dalton’s law • atmosphere • atomic theory • atomic weight • butene • chemical symbol • colour blindness • ethyl ether • gas • law of definite proportions • law of multiple proportions • northern lights • rain

Photos and Videos

John Dalton, detail of an engraving by W. Worthington, after a portrait by William Allen, 1814.

Understanding John Dalton's atomic theory of matter

How scientists discovered atoms

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Joseph-Louis Gay-Lussac, engraving by Ambroise Tardieu.

Joseph-Louis Gay-Lussac

French scientist

Jöns Jacob Berzelius

Jöns Jacob Berzelius

Swedish chemist

Joseph Priestley

Joseph Priestley

English clergyman and scientist

Cavendish, Henry

Henry Cavendish

British physicist

Helmont, Jan Baptista van

Jan Baptista van Helmont

Belgian scientist

Henri-Victor Regnault

Henri-Victor Regnault

French chemist and physicist

Ernest Rutherford

Ernest Rutherford

British physicist

Joseph Black, detail of an engraving by J. Rogers after a portrait by Sir Henry Raeburn

Joseph Black

British scientist

Sir Humphry Davy

Sir Humphry Davy

British chemist

J.J. Thomson

J.J. Thomson

British physicist

Venki Ramakrishnan

Indian-born physicist and molecular biologist

Francis William Aston.

Francis William Aston

British physicist and chemist

Crookes

Sir William Crookes

British chemist

Daniell, John Frederic

John Frederic Daniell

British chemist

Sir John Sealy Townsend

Irish physicist

Swan, Joseph

Joseph Swan

English physicist and chemist

William Prout

British chemist

British chemist and physicist James Dewar

Sir James Dewar

British scientist

George Johnstone Stoney

Irish physicist

Thomas Andrews.

Thomas Andrews

Irish chemist and physicist

Quiz

Laboratory glassware (beakers)

Know Your Chemistry Quiz

Michael Faraday (L) English physicist and chemist (electromagnetism) and John Frederic Daniell (R) British chemist and meteorologist who invented the Daniell cell.

Faces of Science

Michael Faraday (L) English physicist and chemist (electromagnetism) and John Frederic Daniell (R) British chemist and meteorologist who invented the Daniell cell.

Faces of Science

Italian-born physicist Dr. Enrico Fermi draws a diagram at a blackboard with mathematical equations. circa 1950.

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Beet. Beta vulgaris. Sugar beet. Two rows of harvested beets.

History of Scientists, Inventors, and Inventions Quiz

Michael Faraday (L) English physicist and chemist (electromagnetism) and John Frederic Daniell (R) British chemist and meteorologist who invented the Daniell cell.

Faces of Science