Chemistry

Problem

Two deuterium nuclei fuse according to the incomplete reaction

^{2}_{\,1}\mathrm{H}+^{2}_{\,1}\mathrm{H}\;\longrightarrow\;^{3}_{\,2}\mathrm{He}+X

. Which particle is represented by

X

so that the reaction is balanced? a)

\gamma

photon b)

^{1}_{\,0}n

^{1}_{\,1}p

e^{+}