Question

The number of $\alpha$-particles emitted during the radioactive decay chain from $\frac{88}{226}Ra$ andending at $\frac{82}{206}Pb$ is

• A. $5$
• B. $4$
• C. $6$
• D. $3$
• E. $2$

Answer 1

Answer: (A)

$\Delta A=226-206=N\times 4$
($N$-No. of $\alpha$-particles).
or $N=5$