What is radioactive dating used for C2c public adult chat


14-Nov-2017 06:00

"Near the end you imply that low petrologic type chondrites are the most easily dated.

Actually, meteorites that formed by melting, e.g., the various types of achondrites, usually give more precise ages.

Increasingly, the other techniques are used, such that probably no one technique dominates for meteorite dating.

Only the latter two "extinct" nuclides are used in dating.

Any argon present in a mineral containing potassium-40 must have been formed as the result of radioactive decay.

F, the fraction of K40 remaining, is equal to the amount of potassium-40 in the sample, divided by the sum of potassium-40 in the sample plus the calculated amount of potassium required to produce the amount of argon found. In spite of the fact that it is a gas, the argon is trapped in the mineral and can't escape.

An atom with the same number of protons in the nucleus but a different number of neutrons is called an isotope.

what is radioactive dating used for-76

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For example, uranium-238 is an isotope of uranium-235, because it has 3 more neutrons in the nucleus.

Radiometric dating is a means of determining the "age" of a mineral specimen by determining the relative amounts present of certain radioactive elements.



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