It is easy to show that two elements of different atomic weight must differ either in their chemical or in their physical properties. If elements are inseparable chemically their affinity A must ...

One of the unsolved problems in hydrogen research is how to provide these isotopes in a highly pure form in an efficient and cost-effective way, as they have very similar physical properties.

While the number of protons defines the element (e.g., hydrogen ... stable isotopes participate freely in chemical reactions and in biological and geochemical processes, but the rate at which heavy ...

This Section implements all activities of the IAEA's Water Resources Programme, which promotes and transfers know-how on the use of isotope hydrology as an effective ... the naturally-occurring ...

This variation in the relative abundance of stable isotopes results from tiny mass differences that cause the isotopes to act differently in chemical reactions and physical processes. The lighter ...