## College Physics (4th Edition)

We can write the symbol for this nuclide: $^{88}_{38}Sr$
The upper number is the total number of nucleons (neutrons and protons), while the bottom number is the number of protons. The element with 38 protons in the nucleus is strontium with the chemical symbol $Sr$. We can write the symbol for this nuclide: $^{88}_{38}Sr$