Atomic Theorey Timeline

Main

Gutenberg Printing Press

1440

Discovery of America

1492

Reformation of Catholic Church

1517

Galileo convicted of Heresy

1674

Marie Curie

1698

helped discover radioactivity

Joseph Priestley

1774

discovered oxygen, carbon monoxide, and nitrogen dioxide

Decleration of Independence

1776

Antonie Lavoiser

1789

discovered the law conservation of mass which means the reactants and products of mass have to equal each other, he is also the father of modern chemistry

Allesandro Volta

1800

discovered electrochemical cell and batteries

John Dalton

1803

John Dalton discovered that atoms are invisible

Michael Faraday

1831

Discovered electricity and electrochemistry

Civil War

1861

Alfred Nobel

1866

discovered dynamite, and one first place in the nobel peace prize

First Transcontinental Railroad in the U.S.

1869

Eugen Goldstein

1886

Discovered cathode rays deflect by charged plates, while he was experimenting

Louis Pasteur

1888

Discovered Pasteurization process

Guilielmo Marconi

1895

Discovered the radio

Henri Becquerel

1896

discovered radioactivity of atoms

Max Planck

1899

Discovered E=HV Which is a physical constant that is the quantum of action in quantum mechanics. The Planck constant was first described as the proportionality constant between the energy (E) of a photon and the frequency (ν)

Ernest Rutherford

1899

Discovered that atoms are mostly empty space

JJ Thomson

1904

Discovered Plum Pudding Model, which is a model that was a theory that the atom was a solid and massive thing of positive charge dotted with negative charges

Robert Millikan

1909

Had oil drop experiment lab to measure the charge of an electron

Henry Moseley

1913

determined an element by number of protons in a nucleus, also found out the number protons in an element determines where it belongs on a periodic table

Assasination of Archduke Ferdinand

1914

Bolshevic Revolution

1917

Treaty of Versailles

1919

Albert Einstein

1921

Discovered photoeletric effect, where electrons are emitted from matter as a consequence of their absorption of energy from electromagnetic radiation of very short wavelength and high frequency, such as ultraviolet radiation

Sir Fredrick Banting

1923

discovered isolated insullin, which is used for diabetic people to maintain there blood sugar levels.

Erwin Scrodinger

1926

Discovered the wave equation. The wave equation is an important second-order linear partial differential equation for the description of waves such as sound waves, light waves and water waves

Philo Farnsworth

1927

Made the first demonstration of the TV

Werner Heisenberg

1927

Discovered the uncertainty principle, which means, the position and momentum of a particle cannot be simultaneously measured with arbitrarily high precision

Neils Bohr

1927

Created Quantam Mechanics which provides a mathematical description of much of the dual particle-like and wave-like behavior and interactions of energy and matter.

Louis Debrogile

1929

Created Quantam Theorey

James Chadwick

1932

James Chadwick discovered the Neutron which is a subatomic hadron particle which has no net electric charge and a mass slightly larger than that of a proton

Wallace Carothers

1935

Created nylon

Bombing of Pearl Harbor

1941

Leo Szilard

1942

discovered Nuclear chain reactions and atomic bomb

Internet

1962

First Cell Phone

1973

Kary Mullis

1983

discovered polymerase chain reaction, which allowed scientists to make millions of copies of a scarce DNA sample