# How many protons and neutrons does an atom of c-14 have?

The ""^14C nuclide has $\text{6 nuclear protons}$, and $\text{8 neutrons.}$
How do you know? Well, it is a carbon nucleus by specification. ALL carbon nuclei contain $6$ $\text{protons}$, 6 positively charged, massive nuclear particles; i.e. $\text{Z, the atomic number}$ $=$ $6$. This what defines the atom as $\text{carbon}$.
But here the nucleus also contains $8$ $\text{neutrons}$, 8 neutrally charged, massive nuclear particles. The sum of protons and neutrons constitutes MOST of the mass of the atom, hence we have a ""^14C isotope. Most carbon nuclei contain only $6$ $\text{neutrons}$ to give the ""^12C isotope. A few carbon atoms have $7$ $\text{neutrons}$ to give the ""^13C isotope.