To identify the isotope, we can use the following method:
The mass number of an isotope is the sum of protons and neutrons in its nucleus. In this case, the isotope has 7 protons and 9 neutrons.
Mass number = Number of protons + Number of neutrons
Mass number = 7 + 9 = 16
The name of the isotope is typically written as the element's name followed by the mass number. Therefore, the isotope with 7 protons and 9 neutrons is called Nitrogen-16.
The correct answer is: d) Nitrogen-16.
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