Tracing Unidentified Skeletons Using Stable Isotopes
"You are what you eat"
This rule also applies at the atomic level: your body's atoms come from your food and drink. Atoms of almost all the chemical elements (carbon, oxygen, hydrogen, etc.) have more than one possible atomic weight. These different atoms of the same element are called isotopes. For example oxygen (O) has three naturally occurring isotopes: O-16, O-17, and O-18 (16O, etc.) These isotopes never disintegrate; we call them stable isotopes to distinguish them from the better known radioactive isotopes used in medical treatment.
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