-
400
Democritus
He believed matter was made up if individual particles called atoms. He also believed atoms could not be created, destroyed, or further divided. -
440
Empedolces
Empedolces suggested that the world was made uo of four elements; earth, water, fire, and air. -
Jul 1, 1200
Sunglasses
Sunglasses are invented in China. -
Aug 11, 1304
Battle
Sea battle of Zierikzee -
Sep 8, 1449
Battle
Battle of Tumu Fortress, Mongolians captures the Chinese emperor. -
Aug 3, 1492
Christppher Columbus
Sets sail on his 1st voyage. -
Jun 9, 1549
England
England enforces Act of Supremacy -
Feb 9, 1554
Battle
Battle at London -
John Dalton
Dalton accurately determined the mass ratios of elements involved in the reactions. His atomic theory explains the conservation of mass in a chemical reation as being the result of seperation, combination, and rearrangement of atoms. -
J.J. Thomson
J.J. Thomson determined the ration of the atoms charge to its mass. He also concluded that the mass of the charged particle was much less than that of a hydrogen atom. Another thin he identified was the first subatomic particle called the electron. -
Ernest Rutherford
He calculated that an atom consisted mostly of empty space through which electron move. He also concluded there was a tiny dense region called the nucleus. -
Niels Bohr
Bohr proposed the quantum model for the hydrogen atom. He also predicted the frequencies of lines in hydrogen's atomic emission spectrum. -
!st Airline Flight
The first airline flight was from St. Petersburg Florida by Tony Jannus. -
Baseball
!st legal baseball game on a Sunday. -
Louis de Brogile
Jouis de Brogile saw only whole numbers of wavelenghts are allowed in a circular orbit of a fixed radius. -
James Chadwick
James showed that the nucleus contained another subatomic particle called the neutron. The neutron has the same mass as a proton, but it carries no electric charge. Alsp electrons, protons, and neutrons account for all mass of the atom. -
Pope crowns a king.
Pope Formosa crowned king Arnulf of Karinthie/French emperor -
Vikings
The vikings attacked Lindisfarne Island
