Four radioisotopes commonly used radiometric dating

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Radiometric dating or radioactive dating is a technique used to date materials such as rocks or carbon, in which trace radioactive impurities were selectively incorporated when they were formed.

Radioisotopes are an essential part of radiopharmaceuticals.Different isotopes of the same element have the same number of protons in their atomic nuclei but differing numbers of neutrons.They can also be defined as atoms that contain an unstable combination of neutrons and protons.Ionization smoke detectors use an ionization chamber and a source of ionizing radiation to detect smoke.This type of smoke detector is more common because it is inexpensive and better at detecting the smaller amounts of smoke produced by flaming fires.

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