The nuclear radius is of the order of 10

-13 cm while atomic radius is of the order 10-8 cm. Assuming the nucleus and the atom to be spherical, what fraction of the atomic volume is occupied by the nucleus ?

Volume of nucleus = 4 $\mathrm{\pi}$(10

^{-13})

^{3}cm

^{3}

Volume of atom = 4$\mathrm{\pi}$(10

^{-8})

^{3 }cm

^{3}

Fraction of atomic volume occupied by nucleus = (10

^{-13})

^{3}/ (10

^{-8})

^{3}= 10

^{-15}

**
**