Atomic Structure

Atomic Structure

1804 - John Dalton thought that matter was made up of tiny spheres (atoms) that couldn't be broken up

100 years later - JJ Thomson discovered that electrons could be removed from atoms, he thought that atoms were spheres of positive charge with tiny negative electrons stuck in them, like a plum pudding.

1909 - Ernest Rutherford tried firing alpha particles at thin gold foil, most of them just went straight through, but the odd one came…