Atomic Models
He proposed the first idea of the atom around 400 BCE.
Democritus
This device helped J.J. Thomson discover the electron.
Cathode Ray Tube
He discovered the electron using a cathode ray tube.
J.J Thompson
J.J. Thomson’s experiment showed that atoms contain these.
Electrons
This model looked like a 'plum pudding' with electrons scattered inside.
Thompson Model
In Rutherford’s gold foil experiment, these were fired at a thin sheet of gold.
Alpha Particles
He discovered the nucleus by shooting alpha particles at gold foil.
Ernest Rutherford
Rutherford's surprising result: some alpha particles did this when they hit the foil.
Bounced back/reflected
This scientist proposed that electrons orbit the nucleus in fixed energy levels.
Bohr
Millikan used this experiment to calculate the charge of a single electron.
Oil Drop experiment