One isotope of oxygen has 8 protons and 10 neutrons. Which is the correct reference for this isotope? A. oxygen-18 B. oxygen-2 C. oxygen-8 D. oxygen-10
A. Oxygen-18 is the correct reference for this isotope. As this notation requires the name of the element followed by a dash and the mass number of that corresponding element. The mass number is obtained by adding the number of protons and neutrons together as in this example.
