Ernest Rutherford is the subject of my final chapter in this series. He first discovered a concentrated area in the center of the atom which is know today to be the nucleus. Secondly, he defined the atom to be mostly empty space which is called the electron cloud because there is not a known barrier at the end of an atom to confine it to a certain space.
Great use of the picture! It really shows exactly what Rutherford discovered and how it impacted science today.
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