How many neutrons and protons are there in the following nuclei?
$_{6}^{13}C, _{8}^{16}O, _{12}^{24}Mg, _{26}^{56}Fe, _{38}^{88}Sr$

For any nucleus $_{Z}^{A}X$,the number of protons is equal to the atomic number $(Z)$,and the number of neutrons is equal to the mass number $(A)$ minus the atomic number $(Z)$: $n = A - Z$.
$1. _{6}^{13}C$: Protons = $6$,Neutrons = $13 - 6 = 7$.
$2. _{8}^{16}O$: Protons = $8$,Neutrons = $16 - 8 = 8$.
$3. _{12}^{24}Mg$: Protons = $12$,Neutrons = $24 - 12 = 12$.
$4. _{26}^{56}Fe$: Protons = $26$,Neutrons = $56 - 26 = 30$.
$5. _{38}^{88}Sr$: Protons = $38$,Neutrons = $88 - 38 = 50$.