-
JOHN DALTON
John Dalton believed that element are made of atoms. He said different elements have different atoms. He thought compounds are made of different elements. -
ERNST RUTHERFORD
Ernst discovered that alpha particles have a positive charge. The alpha particles either reflected of went through the gold foil. -
J. J. THOMPSON
Thompson discovered cathode rays. He found out the charge of an electron is negative. Electrons move from the negitive end to the positive end. -
NIELS BOHR
Bohr believed that all electrons are the same. He believed electrons orbit the nucleus.
