Chemistry timeline

Aristotle

310

Wrote extensively on many subjects, inclding politics, ethics, nature, physics, and astronomy.
One of the most inflential philosophers.

Democritus

460

Matter is composed of empyt space through which atoms move
Atoms solid, invsible, indestructble and homogenoues

Printing press

Jan 1, 1440

Johannes Gutenberg invented the priting press.
Made it easier for more copies of things to be printed like books, newspapers, Bilbles, etc.

James Hargreaves

Jan 1, 1764

Invented the spinning jenny.
Multi-spindle spinning frame.

Nicolas Joseph Cugnot

Jan 1, 1769

Invented the first self-propelled road vehicle, he was a French engineer and mechanic.

Antoine Lavoisier

Jan 1, 1778

Disovered the role oxygen plays in combustion.
Predicted the existence of silicon.
Estbalished that sulfur was an element rather than a compound.
Considered to be father of modern chemistry

Joseph Proust

Jan 1, 1799

Law of constant composition.
Stated that in chemical reactions matter is neither created nor destroyed.

William Crookes

Jan 1, 1800

Cathodes rays were actually a stream of chagred particles.
The particles carried a negative charge.
https://www.youtube.com/watch?v=O9Goyscbazk

John Dalton

Jan 1, 1803

Matter composed of extremely small particles called atoms
Atoms cannot be created, divided into smaller particles, or destroyed
In chemcial reaction atoms are separated, combined, or rearranged

Richard Trevithick

Jan 1, 1804

Inveneted the locomotive.
Made transportation faster and easier for people traveling long distances.

Amedeo Avogadro

Jan 1, 1811

Principle stating that equal volumes o gases at the same temperature and pressure contian the smae number of molecules regardless o ftheir chemical nature and phsyical properties.
Avogadro's Law states the relationship between the masses of the same volume of different gases.

Barthelemy Thimonnier

Jan 1, 1830

Invented the first sewing machine that was functionable.

Samuel Morse

Jan 1, 1835

Invented a way of communication by a series of on-off tones, light flashes, or clicks. Each dot and dash are arranged in different ways to make up different letters and numbers.

J.J. Thomson

Jan 1, 1897

Showed that cathod rays were composed of a previously unknown negativley charged particle
Finding evidence for isotopes of a stable element
:https://www.youtube.com/watch?v=GzMh4q-2HjM

Madame Curie

Jan 1, 1898

Madame Curie and husband announced the existence of the element radium.
Isolated pure radium metal.

Orville & Wilbur Wright

Jan 1, 1899

Invented the first long lasting airplane, which made traveling even faster than traveling by locamotive.

Willis Haviland Carrier

Jan 1, 1902

Invented the air-conditioner, helped cool down houses faster and get rid of humidity.

Ernest Rutherford

Jan 1, 1902

Prdouced Theory of Atomic Disintergration
Carried out Geiger-Marsden experiment which showed the nuclear nature of atoms be deflecting alpha particles passing through thin gold foil
https://www.youtube.com/watch?v=kHaR2rsFNhg

Albert Einstein

Jan 1, 1905

Determined that the laws o fphysics are the same for all non-accelerating observers.
The speed of light in vacuum was independent of the motion of all observers.
https://www.youtube.com/watch?v=wteiuxyqtoM

Robert Millikan

Jan 1, 1908

Measured the cahrge on an electron.
Able to show that the cahrge on a drop was always an integral multiple of a small.

Henry Moseley

Jan 1, 1912

Attained a radioactive source of radium inventing the first atomic battery.
Observed and measured x-ray spectra of various chemcial elements.

Niels Bohr

Jan 1, 1913

Adapted Rutherford's nuclear structure to Max Planck's quantum theory and created his Bohr model of the atom.
Introdcued the idea that an electron oculd drop from a higher energy orbit to a lower one.
https://www.youtube.com/watch?v=ZkNPBy2i0ss

Max Planck

Jan 1, 1918

Orginated quantum theory.

Louis de Broglie

Jan 1, 1924

Suggested that the wave nature of electrons.
Suggested that all matter has wave properties.

Werner Heisenberg

Jan 1, 1925

Publsihed his work with a breakthrough paper, matrix, formulation of quantum mechanics.
Also made imporatnat contributions to the thoeries of the hydronamics of turbulent flows, atomic nucleus, ferromagnetism, comsic rays, and subatomic particles.

Alexander Fleming

Jan 1, 1928

Discovered penecillian.

Negative pressure ventilator (Iron lung)

Jan 1, 1928

First iron lung built by Philip Drinker and Louis Agassiz Shaw Jr.
Air pumps change the pressure insdie a rectangular, airtight metal box, pulling air in and out of the lungs

James Chadwick

Jan 1, 1932

Discovered the neutron.
Wrote the final draft of the MAUD report.

Erwin Schrodinger

Jan 1, 1935

Proposed the Schrodinger's cat thought experiment.

Henri Becquerel

Jan 1, 1986

Explained that penetrating radiation came from uranium itself.