atomic timeline

Events

Democritus

400 BC

Born in Abdera, Greece 460 BC-370 BC
Came up with the atomic theory/atoms
Came up with the idea of the universe is composed of two things: atoms and the void

Isaac Newton

1687

Born in Woolsthorpe, England Jan 4, 1643- March 31, 1727
Came up with the three laws of motion/gravity

John dalton

1803

Born in Eaglesfield, England Sept 6, 1766- July 26, 1844
He came up with the modern atomic theory, first charts of atomic weights.

Wilhelm C. Roentgen

1895

Born in Remscheid, Germany March 27, 1845- Feb 10, 1923
Invented the X-ray generator

Henri Becquerel

1896

Born in Paris, France Dec 15, 1852- Aug 25, 1908
He discovered radioactivity.

.J. Thomson

1897

Born in Cheetham Hill, UK Dec 18, 1856- Aug 30, 1940
He discovered the electron by using cathode rays.

Marie Curie

1898

Born in Warsaw, Poland Nov 7, 1867- July 4, 1934
She discovered Polonium, radium and radioactivity (coined the term)

Ernest Rutherford

1899

Born in Nelson, New Zealand Aug 30, 1871- Oct 19, 1937
He introduced the Alpha and Beta radiation, radioactive preparations gave rise to the formations of gases.

Albert Einstein

1907 - 1915

Born in Ulm, Germany March 14, 1879- April 18, 1955
Came up with the Theory of Relativity, E=mc2

Robert Millikan

1909

Born in Morrison, Illinois March 22, 1868- Dec 19, 1953
He did the Millikan Oil Drop Experiment. He also did the measurement of the electronic charge and photoelectric effect

Neils Bohr

1913

Born in Copenhagen, Denmark Oct 7, 1885-Nov 18, 1962
He discovered electrons, radioactivity, theory of a hydrogen atom based on the quantum theory

Werner Heisenberg

1925

Born in Wurzburg, Germany Dec 5, 1901- Feb 1, 1976
He formulated a type of quantum mechanics. He also proposed the “uncertainty relation” in 1927

Erwin Schrodinger

1926

Born in Vienna, Austria Aug 12, 1887- Jan 4, 1961
He made a wave equation that accurately calculated the energy levels of electrons in atoms.

James Chadwick

1932

Born in Manchester, Uk Oct 20, 1891- July 24, 1974
He discovered the neutron

Peter Higgs (1929 C.E. - Present)

1964

Born in Newcastle, UK May 29 1929
He discovered sub particles that have mass.

Atomic Models

Democritus Model

400 BC

PlumPudding Model

1904

Planetary Model

1906

Rutherford Model

1911

Rutherford-Bohr Model

1913

Electron Cloud Model

1926

Major Events

Alexander the Great defeats Darius of Persia

331 BC

Roman conquest of Greece

146 B.C

Constantinople becomes capital of eastern Roman Empire 330 A.D.

330 A.D.

England and Scotland become part of UK of Great Britain

1707

America declares independence from Great Britain

1776

Haiti becomes first independent state in Latin America

1800

US gains the Louisiana Purchase from France

1803

American Civil War begins

1861

Franco-Prussia War begins

1870

Battle of Little Bighorn

1876

George A. Custer dies in battle.

Sino-Japanese begins between China and Japan

1894

War over the land of Korea.

Boer War begins between the British and the Boers

1899

Dutch settlers in South Africa vs British.

Russo-Japanese War begins

1904

Young Turk Revolution

1908

Restoration of the Ottoman constitution.

Assassination of the Archduke of Austria

1914

US declares war on Germany

1917

World War 2 begins

1939

Korean War begins

1950

North invades the South.

Assassination of JFK

1963

September 11 attacks

2001

Benghazi attack on a US consulate

2012