Atom

Greeks

101

Ancient Greeks thought atoms were indivisible. The word atom comes from the Greek word Atomos which means "can't be divided"

John Dalton

Jan 1, 1820

He thought that Atoms were solid spheres

William Crookes

Oct 9, 1870

Made Cathode Ray tube

J.J Thomson

Oct 9, 1897

he discovred electrons and made the plum pudding model.

Neils Bohr

Jan 1, 1914

He figured that electrons are in orbits, or energy levels around the nucleus electrons are in unpredictable motion.

Werner Heisenberg

Jan 1, 1927

He made the atomic theory

Ernest Rutherford

Oct 9, 2012

Discovered the nucleus of an Atom