Atom

|

(Representation of a helium-4 atom with, appearing pink in the center, the atomic nucleus and, in gradient of gray all around, the electronic cloud. The helium-4 nucleus, enlarged on the right, is formed of two protons and two neutrons.) An … Read More

Atomic physics

|

Atomic physics is the field of physics that studies atoms as isolated systems that include electrons and the atomic nucleus. It focuses primarily on the arrangement of electrons around the nucleus and how it is modified. This definition encompasses both … Read More