Radio active dating

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by Tas Walker Radioactive dating begins by carefully measuring the concentrations of radioactive isotopes in rocks.Everything is composed of elements and there are about 90 naturally occurring ones, such as hydrogen, carbon, oxygen and iron.This method relies on the uptake of a naturally occurring radioactive isotope of carbon, carbon-14 by all living things.When living things die, they stop taking in carbon-14, and the radioactive clock is "set"!This is called Therefore the characteristic property of the radioisotope, namely its radioactivity can act as a tag or label, which permits the fate of the element or its compound containing this element to be traced through a series of chemical or physical changes.Some of the application of tracer techniques are discussed below.

The sand grains at the top of the sealed glass are like the atoms of the parent isotope in the rock, and those at the bottom like the atoms of the daughter.Radioactive decay occurs at a constant rate, specific to each radioactive isotope.Since the 1950s, geologists have used radioactive elements as natural "clocks" for determining numerical ages of certain types of rocks. "Forms" means the moment an igneous rock solidifies from magma, a sedimentary rock layer is deposited, or a rock heated by metamorphism cools off.The unstable potassium isotope is called the parent while the argon product is called the daughter.There are a couple of different radioactive forms of uranium that decay into lead.

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