Chemists

Democritus

100

Developed the idea of the atom.

Aristotle

200

DId not believe that everything is made up of atoms, but the four elements (earth, water, fire, wind). https://www.youtube.com/watch?v=PzCppXOY8V4

America discovered

Jan 12, 1492

America was first discovered by Cristopher Columbus.

French and Indian War

Jan 12, 1754

War fought between the French and Indians over land.

Antonie Lavosier

Jan 12, 1772

Came up with the Law of Conservation and he was the first that got people talking about what the atom is actually made of.

Revolutionary War

Jan 12, 1775

War fought between American colonists and Great Britain for freedom.

Declaration of Independence

Jul 4, 1776

announced that the thirteen American colonies, then at war with Great Britain, regarded themselves as thirteen newly independent sovereign states, and no longer a part of the British Empire.

Constitution

Jun 21, 1788

new government ruled based on these rules

Jospeh Proust

Jan 12, 1794

Law of Definite Proportions- This law states that a compound is composed of exact proportions of elements by mass regardless of how the compound was created. For example, to make water there is a specific ratio of grams of hydrogen to grams of oxygen regardless of where your sample of water was found. All water has this particular proportion.

John Dalton

Jan 12, 1803

Came up with an atomic theory and tested it.
https://www.youtube.com/watch?v=wsYDL6EjV4k

Amadeo Avagadro

Jan 12, 1811

In 1811 Avogadro hypothesized that equal volumes of gases at the same temperature and pressure contain equal numbers of molecules. Simple gases are not formed of solitary atoms

Lincoln Assasination

Jan 12, 1865

John Wilkes Booth went into a theatre and assasinated Lincoln.

William Crookes

Jan 12, 1879

Discovered cathode rays had the following properties: travel in straight lines from the cathode; cause glass to fluoresce; impart a negative charge to objects they strike; are deflected by electric fields and magnets to suggest a negative charge; cause pinwheels in their path to spin indicating they have mass.

Henri Becquerel

Jan 12, 1896

While studying the effect of x-rays on photographic film, he discovered some chemicals spontaneously decompose and give off very pentrating rays.

JJ Thomoson

Jan 12, 1897

Discovered the electron while conducting an experiment with a cathode ray tube.

Madame Curie

Dec 12, 1898

Studied uranium and thorium and called their spontaneous decay process "radioactivity". She and her husband Pierre also discovered the radioactive elements polonium and radium.

Max Planck

Jan 12, 1900

used the idea of quanta (discrete units of energy) to explain hot glowing matter.

Albert Einstein

Jan 12, 1905

Created the theory of relativity, E=mc^2 https://www.youtube.com/watch?v=E2i_NeDq9AY

First Automobile

Jan 12, 1908

Running car not drawn by horse and buggie.

Robert Millikan

Jan 12, 1909

Oil drop experiment determined the charge (e=1.602 x 10 -19 coulomb) and the mass (m = 9.11 x 10 -28 gram) of an electron.

Ernest Rutherford

Jan 12, 1911

Described the atom as a tiny, dense, positively charged core (nucleus), nearly all mass concentrated around electrons, and circulate around some distance. Called the nuclear atom or the planetary model of an atom.
https://www.youtube.com/watch?v=wzALbzTdnc8

Henry Moseley

Jan 12, 1912

Discovered and created the atomic battery.

Sinking of the Titanic

Apr 15, 1912

The "unsinkable" ship hit an iceberg and now lies at the bottom of the ocean.

WWI

Jan 12, 1914

War fought over land

Niels Bohr

Jan 12, 1922

Created a theory that hydrogen atom based on quantum theory that energy is transferred only in certain well defined quantities. Electrons should move around the nucleus but only in prescribed orbits. When jumping from one orbit to another with lower energy, a light quantum is emitted.

Erwin Shrodinger

Jan 12, 1930

Viewed electrons as continuous clouds and introduced "wave mechanics" as a mathematical model of the atom.

Louis deBroglie

Jan 12, 1932

Discovered that electrons had a dual nature-similar to both particles and waves. Particle/wave duality. Supported Einstein.

James Chadwick

Jan 12, 1932

Using alpha particles discovered a neutral atomic particle with a mass close to a proton. Thus was discovered the neutron.

Pearl Harbor

Jan 12, 1941

Japanese bombed military island in Hawaii and got the US into the war.

Werner Heisenber

Jan 12, 1958

Uncertainty Priciple- Electrons don't travel in neat orbits. Electrons that contain photons will change momentum and physics https://www.youtube.com/watch?v=noZWLPpj3to