35. • Which one of each of the following pairs of nuclei should it be easier to remove a neutron from?

(a) 8 16 8

Oor 17O,

(b) 20 40 20 Ca or 42Ca,

(c) 5 10 5

B or 11B,

(d) 82 208 83 Pb or 209Bi? State your reasoning in each case.