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I am looking into questions about science I have had for a while which deal with Old Earth Theory. I was wondering if you could explain how scientists derived the half life formulas for radio isotopic decay, how it works, and how they know that other factors (temperature, geological patterns, weather patterns, other radiation present such as ultraviolet rays) have not affected their data. Is there anything known to the science community that affects the validity of different dating methods like Rb-87/St-87 dating, Argon-Argon dating, and Carbon dating? Thank you for your time.
Question Date: 2019-09-26
Answer 1:

Half life (lives) are determined by experiment in the laboratory. When an element decays particles are emitted and the rate of emission can be measured very accurately.

Because radioactivity is a NUCLEAR process with energies millions to billions of times greater than chemical reactions, nuclear processes are pretty much independent of pressure, temperature and other factors.

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