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Identifying the type of decay

In any sample of lead-

214

, half of it decays in less than half hour! This makes it the most radioactive isotope of lead.

It decays into bismuth-

214

, then pollonium-

214

, and so on.

Identify each decay involved in this process.

(Choice A)
Decay $1$ ‍: $α$ ‍ decay $\begin{aligned} \end{aligned}$ ‍ Decay $2$ ‍: $β^{-}$ ‍ decay
(Choice B)
Decay $1$ ‍: $β^{-}$ ‍ decay $\begin{aligned} \end{aligned}$ ‍ Decay $2$ ‍: $α$ ‍ decay
(Choice C)
Decay $1$ ‍: $α$ ‍ decay $\begin{aligned} \end{aligned}$ ‍ Decay $2$ ‍: $α$ ‍ decay
(Choice D)
Decay $1$ ‍: $β^{+}$ ‍ decay $\begin{aligned} \end{aligned}$ ‍ Decay $2$ ‍: $β^{+}$ ‍ decay
(Choice E)
Decay $1$ ‍: $β^{-}$ ‍ decay $\begin{aligned} \end{aligned}$ ‍ Decay $2$ ‍: $β^{-}$ ‍ decay

Class 12 Physics (India)