-
350
Aristotle
aristotle beleived that the world was made up of 4 elements: earth, air, water, and fire. -
440
Democritus
democritus was the first philosopher to come up with the theory that everything is made up of tinier items that are invisable and indestrucable -
Period: Feb 26, 1564 to
Galilei Galileo
when the idea was almost lost, Galileo did an experiments of falling objects brought it back to life -
Robert Boyle
robert boyle proved that the 4 element theory, when he proved that an element are substances that can't be divided into smaller parts. -
John Dalton
came up with the first person to come up with the first atomic theory -
Amedeo Avogadro
he showed told the differences between a atom and a molecule. -
Period: to
James Clerk Maxwell
he came up with the idea that atoms were the world's building blocks. -
Period: to
Lord Ernest Rutherford
discovered protons within the nucleus of the atoms -
Period: to
Dimitri Mendeleev
he orginized the elements into the periodic system -
J.J Thomson
he discovered electrons -
Sir James Chadwick
discovered neutrons within the nucleus
