-
700 BCE
Alchemy
methods for transmitting baser metals into gold -
460 BCE
Democritus
formulation of an atomic theroy of the universe -
332 BCE
aristotle
thought all materials were made up of Earth, Fire, Water, Air -
Robert Boyle
created the modern idea of an atom -
American revolution
the American revolution arose from growing tensions between great Britains north American colonies -
John Dalton
created the theroy that all mater of was made of atoms -
American civil war
the civil war started when the southern states of the united states of America seceded from the union after the election of Abarham Lincoln -
Dmitri
created the periodic tabel, arranged the elements -
J.J Tomson
discovered the electron -
Robert Millikan
discovered the value of an electron charge -
Earnest Rutherford
discovered atoms have small charge nucleus sorunded by empty space -
Neils Bohr
Helped discover the atomic structure -
World war 1
began in 1914 after the assasination Archduke Franz Ferdinand
lasted from 1914 to 1918 -
hans Geiger
helped discover the atomic nucleus -
world war 2
was a global war which lasted 1939 to 1945 -
James Chadwick
discovered the neutron -
Columbus arrives in America
in 1492 Clumbus sail the ocean and discovered the America, Whatta guy!!! -
Hiroshima
During world war 2 America dropped a 5 ton bomb on the city of Hiroshima