Answer
$^{26}_{13}Al + ^{0}_{-1}e→ ^{26}_{12}Mg$
Work Step by Step
Positron emission:
$^{26}_{13}Al → ^{0}_{+1}e + ^{26}_{12}Mg$
Electron Capture:
$^{26}_{13}Al + ^{0}_{-1}e→ ^{26}_{12}Mg$
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