Photo: Niels Bohr's research notes for his new atomic theory Rutherford's find came from a very strange experience. Everyone at that time imagined the atom as a "plum pudding." That is, it was roughly ...

Since the atomic nucleus was first proposed in 1911, physicists simply assumed it was round. But are the nuclei of atoms really round? Intuitively this shape makes sense and physicists believed it ...

Clusters of up to 74 helium atoms about a single ion have been produced. Helium atoms can form clusters about a central single ion. These clusters have shell-like structures, and they are especially ...