Question

Complete each nuclear fission reaction.

235
92
U +
1
0
n →
90
36
Kr +
A
56
Ba + 3
1
0
n
A:
239
94
Pu +
1
0
n →
B
C
Ba +
91
38
Sr + 3
1
0
n
B:
C:

Answer 1

First reaction:
235_92 U + 1_0 n → 90_36 Kr + 143_56 Ba + 3 1_0 n
(check: 235+1 = 90+143+3 = 236; 92 = 36+56)

Second reaction:
239_94 Pu + 1_0 n → 146_56 Ba + 91_38 Sr + 3 1_0 n
(check: 239+1 = 146+91+3 = 240; 94 = 56+38)