The number of neutrons in an isotope can be found by subtracting the atomic number (the number of protons) from the mass number (the sum of protons and neutrons).
Given:
- The atomic number [tex]\( A \)[/tex] is 88.
- The mass number [tex]\( B \)[/tex] is 220.
The number of neutrons [tex]\( C \)[/tex] can be calculated as:
[tex]\[ C = B - A \][/tex]
Substituting the given numbers:
[tex]\[ C = 220 - 88 \][/tex]
[tex]\[ C = 132 \][/tex]
Therefore, the number of neutrons in the isotope is 132.