Radioactive decay follows first order kinetics and the rate constant is often termed as decay constant. Certain radioactive substances may undero sequential decays in order to convert intoa stable nucleus. The series comprisingall such elements is termed asradioactive disintegration series. If a radioactive disintegration series is observed involving only alpha and betadecays then which of the following isotopes cannot be a part of it if the parent isotope of the series is ._(91)Pa^(234).

Radioactive decay follows first order kinetics and the rate constant i

1.	Radioactive decay follows first order kinetics and the rate constant is often termed as decay constant. Certain radioactive substances may undero sequential decays in order to convert intoa stable nucleus. The series comprisingall such elements is termed asradioactive disintegration series. If a radioactive disintegration series is observed involving only alpha and betadecays then which of the following isotopes cannot be a part of it if the parent isotope of the series is ._(91)Pa^(234).
Answer» `._(86)Rn^(222)` `._(85)At^(216)` `._(82)PB^(210)` `._(90)Th^(230)` Solution :`[._(91)PA^(234) (4n+2) `series `._(85)At^(216) ` is not a MEMBER of (4n+2) series so it can't be a part of this series.]