Question

234 91 Pa produces ___ + 4 2He

Answer 1

(234 91)Pa --> (A Z)X + (4 2)He

Solution:

1) 234 = A + 4;

A = 234 - 4;

A = 230.

2) 91 = Z + 2;

Z = 91 - 2;

Z = 89.

Therefore,

(A Z)X = (230 89)Ac = actinium-230

(234 91)Pa --> (230 89)Ac + (4 2)He

Answer: (230 89)Ac.