Answer
$^{16}_{8}O+\,^{1}_{1}p\,\rightarrow\,^{13}_{7}N+\,^{4}_{2}He$
Work Step by Step
Oxygen-16 is reacted with a proton to form nitrogen-13 and an alpha particle. We can write the nuclear reaction for this process as
$^{16}_{8}O+\,^{1}_{1}p\,\rightarrow\,^{13}_{7}N+\,^{4}_{2}He$
Sum of masses=17 and charges=9 and are balanced on both the sides. Hence, the equation above should be the balanced nuclear equation required.