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Chapter 196 Two old fights
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... ined based on the discovery of its strata. However, since people's understanding of the atom has gradually deepened, scientists have found a way to identify the absolute age.
Most of the substances found in nature are composed of several isotopes (ie, various atoms with the same atomic number and different mass numbers). Some isotopes are radioactive, that is, their nucleus spontaneously emits radiation and gradually turns into another substance. For example, the radioactive isotope 14c t ...
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