Atoms with the same number of protons but different numbers of neutrons are called isotopes. They share almost the same chemical properties, but differ in mass and therefore in physical properties.

Isotopes, dinosaurs, and the redwood in the ravine. Isotopes are forms of an element that vary ever so slightly in their number of neutrons, leaving what you might call chemical ...

Stable isotope analysis could offer a new tool in the fight against wildlife poaching by helping differentiate legal mammoth ...

One out of 6420 hydrogen atoms, on average, is a deuterium isotope. Deuterium isotopes are distributed in molecules that contain hydrogen, including, importantly, in all forms of water – also water in ...

The U.S. Stable Isotope Production and Research Center will enrich stable isotopes used for cancer treatments, heart disease treatments, space exploration and more.