Calculate the Mass Defect in Ni-59 If the Mass of a Ni-59

Calculate the mass defect in Ni-59 if the mass of a Ni-59 nucleus is 58.69344 u. The mass of a proton is 1.00728 u and the mass of a neutron is 1.008665 u.

A) 0.23212 u
B) 0.77902 u
C) 0.23041 u
D) 0.77589 u
E) 0.22198 u