Nuclear Chemistry

 12) (a) ⁶⁶₃₂Ge

             Ge has 32 ¹₁p and 34 ¹₀n with a ratio of 34 ¹₀n/32 ¹₁p = 1.06:1. Because of the low ratio Ge undergoes positron (⁰₁e) emission.      

       (b) ¹⁰⁵₄₅Rh

             Rh has 45 ¹₁p and 60 ¹₀n with a ratio of 60 ¹₀n/45¹₁p = 1.33:1. Because of the high ratio Rh undergoes beta (⁰_-1e) emission.

       (c) iodine-137, ¹³⁷₅₃I

             I has 53 ¹₁p and 84 ¹₀n with a ratio of 84 ¹₀n/53¹₁p = 1.58:1. Because of the high ratio iodine-137 undergoes beta (⁰_-1e) emission.

       (d) cerium-133, ¹³³₅₈Ce

             Ce has 58¹₁p and 75 ¹₀n with a ratio of 75 ¹₀n/58¹₁p = 1.29:1. Because of the low ratio cerium-133 undergoes positron (⁰₁e) emission.