question_answer

In the nuclear reaction \[_{1}^{1}H\to _{0}^{1}n+_{Q}^{P}X\] Find \[\mathbf{P},\text{ }\mathbf{Q}\] and hence identify \[\mathbf{X}\].   

Answer:

                Using the laws of conservation of mass and charge, we get \[P+1=1\] or \[P=0\] \[Q+0=1\] or \[Q=1\] Thus \[_{Q}^{P}X\] is a positron \[(_{+1}^{0}e)\].