Radioactive dating in physics

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For example, carbon atoms have 6 protons in the nucleus. Since protons are positively charged, a neutral carbon atom also has 6 electrons in orbits around the nucleus. Atoms can't be this simple, however. The positvely charged protons repel each other like charges repel through the electromagnetic force and so do not want to be close to each other; however, the protons also attract each other through the strong nuclear force. But at the distances between protons in the nucleus, the repulsive forces are stronger than the attractive forces, and so a nuclues made only of protons would be unstable.
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Radiometric Dating – Radioactive Dating

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Radioactive Decay - University Physics Volume 3 | OpenStax

Carbon has a large number of stable isotopes. All carbon atoms contain six protons and six electrons, but the different isotopes have different numbers of neutrons. The amount of carbon in the atmosphere has not changed in thousands of years. Even though it decays into nitrogen, new carbon is always being formed when cosmic rays hit atoms high in the atmosphere.
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10.4: Radioactive Decay

Because the radioactive half-life of a given radioisotope is not affected by temperature, physical or chemical state, or any other influence of the environment outside the nucleus save direct particle interactions with the nucleus, then radioactive samples continue to decay at a predictable rate and can be used as a clock. This makes several types of radioactive dating feasible. For geologic dating, where the time span is on the order of the age of the earth and the methods use the clocks in the rocks , there are two main uncertainties in the dating process:.
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