The binding energy per nucleon of O16 is 7.97 MeV and that of O17 is 7.7 5 MeV. The energy in MeV required to remove a neutron from O17 is

Total binding energy of O17=(17)(7.75MeV)                                            = 131.75 MeVTotal binding energy of O16 = (16) (7.79 MeV)                                            = 127.52 MeVEnergy required to remove a neutron from O17= (131.75 - 127 .52) MeV = 4.23 MeV