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OpenStudy (anonymous):
How are N-14 and N-15 different?
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OpenStudy (joannablackwelder):
The 14 and 15 are the mass numbers of these atoms. the mass number is the sum of protons and neutrons. The number of protons won't change, so N-14 has 7 protons and 7 neutrons and N-15 has 7 protons and 8 neutrons.
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