Answer
We can write the symbol for this nuclide:
$^{131}_{53}I$
Work Step by Step
The upper number is the total number of nucleons (neutrons and protons), while the bottom number is the number of protons. The element with 53 protons in the nucleus is iodine with the chemical symbol $I$.
We can write the symbol for this nuclide:
$^{131}_{53}I$
