LAGUNA DESIGN / SCIENCE PHOTO LIBRARY LAGUNA DESIGN / SCIENCE PHOTO LIBRARY
Illustration of a heavy water, or deuterium oxide, molecule. The hydrogen isotope deuterium gives heavy water properties different from those of normal water. Normal hydrogen has one proton, deuterium an additional neutron. Protons are shown blue, neutrons red and electrons with a minus sign.
Model release not required. Property release not required.