Which of the following isotopes will show radioactive disintegration?

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$_{6} C^{12}$

$_{88} {Bi}^{209}$

$_{82} {Pb}^{210}$

$_{82} {Pb}^{206}$

answer is B.

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Detailed Solution

$Pb - 206$ for the uranium series, Pb for the actinium series, and lead-208 for the thorium series are the last products of the three series of naturally occurring radioactive elements. There are 43 other lead isotopes, all of which are radioactive. Information about the isotope decay of lead in nature.

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