Answer
a) $^{90}_{38}Sr$ -> $^{90}_{39}Y+^{0}_{-1}e$
b) $^{14}_{6}C$ -> $^{14}_{7}N+^{0}_{-1}e$
c) $^{137}_{55}Cs$ -> $^{137}_{56}Ba+^{0}_{-1}e$
d) $^{239}_{93}Np$ -> $^{239}_{94}Pu+^{0}_{-1}e$
e) $^{50}_{22}Ti$ -> $^{50}_{23}V+^{0}_{-1}e$
Work Step by Step
a) $^{90}_{38}Sr$ -> $^{90}_{39}Y+^{0}_{-1}e$
b) $^{14}_{6}C$ -> $^{14}_{7}N+^{0}_{-1}e$
c) $^{137}_{55}Cs$ -> $^{137}_{56}Ba+^{0}_{-1}e$
d) $^{239}_{93}Np$ -> $^{239}_{94}Pu+^{0}_{-1}e$
e) $^{50}_{22}Ti$ -> $^{50}_{23}V+^{0}_{-1}e$
