Describe in your own words how you calculated the number of neutrons in these oxygen isotopes. Then sum up your answer by writing an equation that begins: "number of neutrons = ..."

To calculate the number of neutrons in an oxygen isotope, you first need to know the atomic number and the atomic mass number of the isotope. The atomic number of oxygen is 8, which means it has 8 protons. The atomic mass number is the total number of protons and neutrons in the nucleus.

For example, if we take Oxygen-16 (16O), the most common isotope of oxygen, the atomic mass number is 16. To find the number of neutrons, you subtract the atomic number (number of protons) from the atomic mass number.

So for Oxygen-16, it would be 16 (atomic mass number) - 8 (atomic number) = 8 neutrons.

In general, the equation to find the number of neutrons is:

"Number of neutrons = Atomic mass number - Atomic number"