A sample has two isotopes A and B having masses 50 g and 30 g respecti – InterviewSolution

1.	A sample has two isotopes A and B having masses 50 g and 30 g respectively. A is radioactive and B is stable. A decays to A′ by emitting α particles. The half life of A is 2 hrs. Mass numbers of A and A′ are 150 and 146 respectively. In 4 hour, if the number of α particles emitted is NAn where NA= Avogadro’s number, then n=
Answer» A sample has two isotopes $A$ and $B$ having masses $50 g$ and $30 g$ respectively. $A$ is radioactive and $B$ is stable. A decays to $A^{'}$ by emitting $α$ particles. The half life of $A$ is $2 hrs$ . Mass numbers of $A$ and $A^{'}$ are $150$ and $146$ respectively. In $4$ hour, if the number of $α$ particles emitted is $\frac{N_{A}}{n}$ where $N_{A} =$ Avogadro’s number, then $n =$

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