DAVID NICHOLLS / SCIENCE PHOTO LIBRARY DAVID NICHOLLS / SCIENCE PHOTO LIBRARY
Atomic structure, computer artwork. Schematic representation of the structure of the atom. At the centre of the model is the nucleus, made up of a tightly packed cluster of protons and neutrons. In this classical model, the nucleus is orbited by electrons with defined orbits. Modern quantum physics has shown, however, that is impossible to locate the exact position of electrons around the nucleus.
Model release not required. Property release not required.