Number of neutrons in 10 mg of 14 carbon
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Explanation:
The 14 in C14 means it has 14 protons and neutrons together in the nucleus. So, knowing we have 6 protons, we also know the remaining 8 are neutrons. So now we have 3.011 x 10^20 atoms x 8 neutrons per atom is 2.4 x 10^21 neutrons in total. That's a LOT of neutrons!
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