Question

The ratio of the nuclear radii of the gold isotope ${}_{79}^{197}Au$ and silver isotope ${}_{47}^{107}Ag$ is

• A. $1.23$
• B. $0.216$
• C. $2.13$
• D. $3.46$

Answer 1

Answer: (A)

Here, $A_1=197$ and $A_2=107$
$\therefore \frac{R_1}{R_2}={\left(\frac{A_1}{A_2}\right)}^{1/3}={\left(\frac{197}{107}\right)}^{1/3}=1.225$