Question

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

Answer 1

The correct reference for this isotope is A. Oxygen-18.

Answer 2

The isotope is named by naming the element and then followed by the mass number. The mass number of the atom is the sum of the number of its protons and electrons. From the given, the mass number of oxygen is 18. Thus, the correct reference is letter "A. oxygen - 18".