Ernest Rutherford (1911)

In 1911 Rutherford came up with the idea that the atom was made of a dense particle called the nucleus and had tiny particles called electrons circling it. Rutherford’s atomic model replaced JJ Thomson plum pudding model. Rutherford also discovered alpha and beta rays. He was the scientist that preformed the gold foil experiment. Rutherford's model is also known as the planetary model.