Potassium 40 radioactive dating

After another half-life, 25 units of the parent isotope will remain, and 75 units of the daughter product will have been produced.

Occasionally, ages can be too old, for example, historic lava flows can yield K-Ar ages of millions of years.This has enabled workers to define a for each radioisotope, the period required for one-half of the original parent population to decay to its stable daughter product.Each radioisotope has its own characteristic half-life.For example, all carbon atoms have six protons; isotopes of carbon can have 6, 7, or 8 neutrons (Table 1).Radioactive isotopes (also called , which is an electron, or negatively charged nuclear particle.

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