Answer
$_{11}^{22}Na$
Work Step by Step
Na-22 undergoes positron emission to form Ne-22
$_{11}^{22}Na → _{10}^{22}Ne +_{+1}^{0}e$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.