Arsenic$-60$ and arsenic$-80$ are both unstable isotopes; however, they undergo different types of radioactive decay.

$60-$ As emits a positron to become more stable, while $80-$As emits beta particle to become more stable. Use what you know about stability and the ratio of protons to neutrons in a nucleus to explain why these two isotopes would decay in different ways to achieve stability.

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Youre correct that both Arsenic60 As and Arsenic80 As are unstable isotopes and undergo different ty... View the full answer