# Another isotope of carbon has a mass of 14. How many protons, neutrons, and electrons are in this isotope?

Well, all isotopes of carbon have $Z = 6$...
And so ""^14C necessarily has 6 nuclear protons. And to account for the remaining mass there are 8 $\text{nucular}$ neutrons. Because the atom is neutral, there must be electrons, in order to balance the nuclear charge.