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how many neutrons could an atom of the element zinc (zn) have?
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Biology, 22.06.2019 03:00
Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .
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Which of the following is an eon in the time scale? phanerozoic proterozoic archean all of the above
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