Carbon with ages up to about 60,000 years can be dated with carbon-14, but compounds or material older than that will not contain any carbon-14.
Stable isotope compositions of individual compounds are a result of their original source feedstock, and then they undergo isotopic changes as a result of biodegradation Radioactive isotopes are different, since radioactive isotopes such as carbon-14 undergo radioactive decay; over time, carbon-14 will be converted into nitrogen-14.
Carbon-14 has a half-life of 5,739 years and can be used for age dating of recent carbon.
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The atom consists of protons (positive charge, mass of 1 atomic mass unit, amu), neutrons (no charge, mass of 1 amu), and electrons (negative charge [-1], mass much smaller than 1 amu).
The number of protons in an atom determines the element and determines the behavior of the atom in chemical reactions.
Isotopes Finally, the number of neutrons can vary within atoms of the same element.
The charge is not affected and the chemical behavior is not affected.
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While many isotopes are possible for a given element, the nucleus will only be stable for a few configurations of protons and neutrons (roughly equivalent numbers of each).Tags: Adult Dating, affair dating, sex dating