When two hydrogen atoms get close enough, the electron from each atom feels an attraction from the proton in the other atom's nucleus. This attraction pulls the atoms together. The electrons end up ...

Thus when an atom absorbs or gives off energy (as in light or heat), the electron jumps to higher or lower orbits. Bohr published these ideas in 1913 to mixed reaction. Many people still hadn't ...

Thus when an atom absorbs or gives off energy (as in light or heat), the electron jumps to higher or lower orbits. Bohr published these ideas in 1913 to mixed reaction. Many people still hadn't ...

Thus, it is hoped they will become an important tool for atom-level material characterization. Laser-driven free-electron lasers use laser pulses instead of magnetostatic undulators, enabling x ...

An atom is made of tiny negatively charged ... Changes to the atomic model Electrons move in fixed orbits, called electron shells, around the nucleus.