Nuclear fission - when the nucleus of an atom splits in two ... drop" theory first posited by Lise Meitner and Otto Frisch ...

Nuclear fission—when the nucleus of an atom splits in two, releasing energy—may seem like a process that is fully understood.

"The word magic is not often used in the context of science. But in the early 1930s, scientists discovered that some atomic ...

The word magic is not often used in the context of science. But in the early 1930s, scientists discovered that some atomic nuclei—the center part of atoms, which make up all matter—were more stable ...

The word magic is not often used in the context of science. But in the early 1930s, scientists discovered that some atomic ...

The magic numbers known to scientists are 2, 8, 20, 28, 50, 82 and 126. They are the same for both protons and neutrons. When a nucleus has a magic number of protons or neutrons, then the particular ...

with electrons orbiting around the nucleus. Nobel prize-winning physicist Niels Bohr described these electrons in the atom as existing in a shell structure. The electrons circulate around the ...

For instance, in Bohr’s model of the atom, he proposed that energy levels of electrons are discrete and that the electrons revolve in stable orbits around the atomic nucleus but can jump from ...