The first 80 elements on the periodic table have stable isotopes. The properties of stable isotopes allow them to be used to understand and manage water and land resources. They are also used in ...

A carbon-14 isotope has one more neutron than carbon-13, for example. Some isotopes are stable and some are unstable. Unstable isotopes decay into other isotopes or elements through radioactive decay.

P. W. Inglett, K. R. Reddy, S. Newman, B. Lorenzen, Increased Soil Stable Nitrogen Isotopic Ratio following Phosphorus Enrichment: Historical Patterns and Tests of Two Hypotheses in a ...

Radioactive decay is a fundamental process in nature by which an unstable atomic nucleus loses energy by radiation. Studying ...

For example, carbon occurs naturally in three isotopes: carbon-12, which has six neutrons (plus six protons equals 12; hence the number), carbon-13, which has seven neutrons, and carbon-14, which ...