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Democritus A Western Philosopher
The theory of Democritus and Leucippus says that everything is made from “atoms”. Also that “atoms” are indestructible and will always be in motion. -
John Dalto Father of Modern Atomic Theory
Had his own theory "Daltons theory ." Had 5 main points about how atoms were arranged. -
William Crooke
Studied the characteristics and atomic compound of cathode rays. -
JJ Thomson
He discovered the electron which he called the corpuscles. -
Dmitri Mendeleev
Dmitri Mendeleev is the scientist that that contributed most to the periodic table and its arrangements. -
Ernest Rutherford Father of nuclear physics
Rutherford studied the radioactivity of an atom. He discovered that there are two types of atoms. -
Niels Bohr
Niels Bohr proposed that electrons traveled in discrete orbit around the nucleus according to the element. -
James Chadwick
He proved the existence of neutrons. -
John Newlands
John Newlands studied the periodic table of elements. Came up with the law of octaves. -
Aristotle Born 384 BC
He believed that matter consisted of four elements. The elements of the earth: Earth, air, water, and fire. -
Period: to
Life span of scientist