-
John Dalton
He figured all elements consisted of atoms. -
Period: to
Atoms
-
Joseph John Thomson
Believed the atom was a sphere or positive matter and electrons are placed by electrostatic forces. -
Nagaoka Hantaro
Created tge incorrect "planetary model". Believed an atom had a large nuecleus with orbiting electrons. -
Ernest Rutherford
like the planetary model, he believed the atoms were made up of a central charge and surrounded by a cloud of electrons. In addition, the nucleuos was smaller. -
Niels Bohr
Presented an atomic structure with chemical and physical properties of the atom. -
James Chadwick
Proved the existance of nuetrons.
