-
340
Aristotle
Aristotle though atoms were void and not possible. He beleived that the four elements water fire earth and air. He though these were the meaning of a things. -
Period: 340 to
Ancient Greek Philosophers
-
440
Democritus
Democritus discover the idea of atoms. His theory started with a gold coin he said if you break it in a half and half till you cannot break it no more. He thought there was a point where you could not break something anymore He called this an atom. -
Jan 1, 1561
Sir Francis Bacon
Taught everyone the you have to oberserve before you start to make theroys -
Period: Oct 13, 1561 to
Modern Chemists
-
Robert Boyle
He created the boil law. If the pressure increase the volume decreases and if the pressure decreases the volume increases -
Antoine Lavoisier
He was know as the father of Modern Chemistry. He discoved that water is made of hydrogen and oxygen. -
John Dalton
John Dalton Theroy 1) All matter is made of atoms. Atoms are indivisible and indestructible. 2) All atoms of a given element are identical in mass and properties 3) Compounds are formed by a combination of two or more different kinds of atoms. 4) A chemical reaction is a rearrangement of atoms. He created this theory and it is still being worked with today. He is a true founder of modern chemistry. -
JJ Thomson
He discoved the electron and used cathode ray tubes to and to dermine the mass and raitio of the electron is 1.759 x 108 coulombs/ gram. -
Ernest Rutherford
He discoved alpha and beta rays emitting from radium. -
Niels Bohr
He discoved that electons do not spiral into the nuculus and came up with rules on how it acually works. -
Empedocles
Empedocles seprated invisible matter into fire water air and earth
