The mass number of helium is 4 and that of sulphur is 32. How many times the radius of sulphur nucleus is bigger than that of helium?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 2
The radius 'r' of a Nucleus -
$r∝A^{1/3}$
$∴\frac{r_s}{r_{He}}=\left(\frac{32}{4}\right)^{1/3}=8^{1/3}=2$