\(\matrix{ 234 \cr x \cr} {Th} \) \(------>\) \(\matrix{ 234 \cr 91 \cr} {Pa}\) \(+\) \(\matrix{ 0 \cr -1 \cr} {e} \) \(= energy\)
The equation above represents decay of a radioisotope by beta emission. Find the value of x
90
92
143
144
