Question

In the following equation representing β- decay, the number of neutrons in the nucleus X is
$_{83}^{210}\text{Bi}\rightarrow X+e^{-1}+\bar{v}$

• A. 127
• B. 125
• C. 84
• D. 126

Answer 1

Answer: (D)

126

Answer 2

The correct answer is (D) : 126.