Worksheet for balancing nuclear equations, featuring decay processes and reaction completion tasks.

1. (i) $^{90}_{38}\text{Sr} \rightarrow ^{90}_{39}\text{Y} + ^{0}_{-1}\text{e}$
(ii) $^{238}_{92}\text{U} \rightarrow ^{234}_{90}\text{Th} + ^{4}_{2}\text{He}$
(iii) $^{40}_{19}\text{K} \rightarrow ^{40}_{20}\text{Ca} + ^{0}_{-1}\text{e}$
(iv) $^{99}_{43}\text{Tc} \rightarrow ^{99}_{44}\text{Ru} + ^{0}_{-1}\text{e}$
(v) $^{32}_{15}\text{P} \rightarrow ^{32}_{16}\text{S} + ^{0}_{-1}\text{e}$
(vi) $^{212}_{87}\text{Fr} \rightarrow ^{208}_{85}\text{At} + ^{4}_{2}\text{He}$

2. (i) $^{3}_{2}\text{He}$
(ii) $^{4}_{2}\text{He}$
(iii) $^{144}_{60}\text{Nd}$
(iv) $^{65}_{29}\text{Cu}$
(v) $^{0}_{+1}\text{e}$
(vi) $^{0}_{0}\gamma$