Question

One isotope of nitrogen has 7 protons and 8 neutrons. Which is the correct reference for this isotope? . . A. . nitrogen-1 . . B. . nitrogen-7 . . C. . nitrogen-8 . . D. . nitrogen-15 .

Answer 1

The correct reference of the isotope is the name of the element followed by its mass number. The mass number of an atom is the sum of its proton and neutrons. From this given, the mass number is, 7 + 8 = 15. Therefore, the proper way of referencing the isotope is nitrogen-15.