-
John Dalton
https://www.youtube.com/watch?v=wsYDL6EjV4k
Atoms of different elements are different. All atoms of the same elements are alike. -
J.J. Thompson
He noticed a movement a movement in a tube. He called the movement cathode rays. -
Lord Ernest Rutherford
https://www.youtube.com/watch?v=Zd6_zVdMgJk
Atoms are made of a small positive nucleus. atoms are mostly empty space.
