Bismuth $\begin{array} { c } 212 \\83\end{array}$ Bi Is Known to Be Radioactive

question 23

Multiple Choice

Bismuth $\begin{array} { c } 212 \\83\end{array}$ Bi is known to be radioactive. The stability of $\begin{array} { c } 212 \\83\end{array}$ Bi with respect to alpha, beta-plus and beta-minus decay is to be determined. The following atomic masses are known: $\begin{array} { l } 4 \\2\end{array}$ He: 4.002603 u $\begin{array} { c } 208 \\81\end{array}$ Tl: 207.981998 u $\begin{array} { c } 212 \\82\end{array}$ Pb: 211.991871 u $\begin{array} { c } 212 \\83\end{array}$ Bi: 211.991255 u $\begin{array} { r } 212 \\84\end{array}$ Po: 211.988842 u The $\begin{array} { c } 212 \\83\end{array}$ Bi nucleus is

• A)subject to alpha decay only.
• B)subject to beta-plus decay only.
• C)subject to beta-minus decay only.
• D)subject to alpha or beta-plus decay, but not beta-minus decay.
• E)subject to alpha or beta-minus decay, but not beta-plus decay.

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Definitions:

Karl Marx

A 19th-century philosopher, economist, and revolutionary socialist best known for his critical theories about capitalism and his ideas that led to the foundation of Marxism.

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