# 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 ?

Fraction of atomic volume occupied by nucleus =  (volume of nucleus) $÷$(volume of atom)
Volume of nucleus = 4 $\mathrm{\pi }$(10-13)3 cm3
Volume of atom = 4$\mathrm{\pi }$(10-8)3 cm3
Fraction of atomic volume occupied by nucleus = (10-13)3 / (10-8)3 = 10-15

• 36

If my guess is correct , give me thumbs up.

Volume = 4 * 3.14 * (10^-13)^3

Volume = 4*3.14*(10^-8)^3

Fraction of atomic volume occupied by nucleus= Volume of nucleus divided by volume of atom

= 10^-5

• -4

what are cathode rays

• -1

It is a beam of electrons emmited from a cathode.

• 1

Volume = 4 * 3.14 * (10^-13)^3

Volume = 4*3.14*(10^-8)^3

Fraction of atomic volume occupied by nucleus= Volume of nucleus divided by volume of atom

= 10^-5