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# General Chemistry

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Moderate

CHEM-VSXO40

A radioactive isotope, Americium-241 $(_{ 95 }^{ 241 }{ Am })$, is used in a commercial smoke detector. It decays by production of alpha particles.

These alpha particles ionize molecules in the air ionization chamber, permitting it to conduct a small electric current. When smoke enters this chamber, the conductivity of the air is changed and triggers the alarm.

If this isotope decays successively by production of $\alpha$, $\alpha$, $\beta$, $\alpha$, $\alpha$, $\beta$, $\alpha$, $\alpha$, $\alpha$, $\beta$, $\alpha$ and $\beta$ particles, what are the final daughter nuclei produced in this process?

A

$_{ 82 }^{ 209 }{ Pb }$

B

$_{ 83 }^{ 209 }{ Bi }$

C

$_{ 84 }^{ 213 }{ Po }$

D

$_{ 83 }^{ 213 }{ Bi }$