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Period: 400 to
Stephen
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460
Democratis
Democritus was born in 460 BCE -
Dalton
John Dalton was born September 6th 1766 -
Daltons atomic theory
Around 1805 Dalton Published his Atomic Theory -
Crooke
William Crooke was born June 17th 1832 -
Newlands
John Newlands was born November 26th 1837 -
JJ thomas
J.J. Thomson was born December 18th 1856 -
Law of octaves
John Newlands publishes his law of octaves -
Principals of Chemistry
Mendeleeve published his two volume textbook called the Principles of Chemistry -
Crookes tube
Around 1869 William Crooke produced the Crookes tube. -
Rutherford
Ernest Rutherford was born August 30th 1871 -
Bohr
Niels Bohr was born October 7th 1885 -
Chadwick
James Chadwick was born October 20th 1891 -
Discovery of the Electron
In 1897 JJ Thomson discovered the electron -
Mendeleev
Dmitri Mendeleeve was born Febuary 8th 1897 -
Logic
Aristotle created a system of logic that is still used today -
Father of Nulear Physics
Ernest Rutherford said that atoms have their positive charge concentrated in a very small nucleus. This created the Rutherford Model. "He is widely credited with first splitting the atom in 1917, and leading the first experiment to 'split the nucleus'" -
Nuetron
In 1932 James Chadwick discovered the Neutron -
Nuetron
In 1932 James Chadwick discovered the Neutron -
Aristotle
Aristotle was born in 384 BCE