Question

A nucleus with a mass number of 64 has a mean radius of about: _________.

Answer 1

Answer:

The correct option is A

Explanation:

From the question we are told that

The mass number is $A= 64$

Generally the mean radius is mathematically evaluated as

$R = R_o A^{\frac{1}{3} }$

Here $R_o$ is a constant with a value  $R_o =1.2*10^{-15}$

So  

     $R = 1.2*10^{-15} * 64^{\frac{1}{3} }$

      $R = 4.8 *10^{-15}$

        $R = 4.8\ fm$